Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f270fd3f089e31…

MALICIOUS

PDF

125.6 KB Created: 2021-06-30 18:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 54c44f2d137b03e33af95355f51efbad SHA-1: ef9ada1fb315c5b0269fcca0f6494136f99c32fa SHA-256: b8f270fd3f089e318b8593090fda52736f805d401469af5df234a4db652712d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised WordPress sites. Heuristics indicate it's a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this malicious intent. No scripts were extracted, but the primary attack vector appears to be directing users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f972e0e0e4---11918830622.pdf In PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/gi1j1v305red8jqlvq51u1kkdt/53842257493.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/dazuwenopagi.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/musomibe.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/92515564711.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/bunujisafumiwiwokujona.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aad814cbe1---51947772611.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608563f28d231---guxakagorogebupan.pdfIn PDF document text
    • http://hopkinshigh1961.com/clients/878968/File/89572626151.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/38e868659684fc2018546791b3c7cc4f/95244719591.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/falibuwodosa.pdfIn PDF document text
    • http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/redajobut.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bfa286bde---risalavededubupaz.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/lkld4llepaclru24afhu7emj20/1548258007.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d3b26b3ac---86860673837.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/1012cd5d763a9586b76014ba182ef985/81842367245.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/376a53377690f940a2967e86ec7d53b8/48990948445.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/3dcb726c8d1a6278044ba244d4ab1639/puwuzunixapigewuwurofi.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5c9f37127---razofopomirapod.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/3b475afa7ed2f7e2b59b47d5c1569017/xutugu.pdfIn PDF document text
    • http://abpaluso.com/upload/file/13397001595.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/papaxapifovulut.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/gevudenodalimefuxovin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=harry%27s+cosmeticology+8th+edition+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB47 17096 bytes
SHA-256: e69c359bf91b5dc0237daf3c99ea0e6aee9666917cb898270682814e06f43351
font_01_sfnt_off000107f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F3 57152 bytes
SHA-256: 69d32e52f960bf59ce45147c129f1152aabb9ec4733bbfb3c17234d372d84af2
font_02_sfnt_off00019d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D66 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off0001b2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001cac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAC2 11416 bytes
SHA-256: e9eaf75b193ce63ea939255f37892af2591d230b52c32dcc6f13cbf61d0e9527

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