Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7094091a8a3f45…

MALICIOUS

PDF

103.0 KB Created: 2021-06-29 01:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3e672bd99cf892f88c5a6f052b5866ae SHA-1: f5facee398f1eacb4c332c09202e3878e795b5ce SHA-256: ab7094091a8a3f45b466d383b7d024245450f95069468d6c89ee7a5a2038f8cd
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to compromised WordPress sites and disposable domains, indicating it functions as a link farm. This is a common technique for distributing phishing lures or directing users to exploit kits. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/74c00d71b790043a25788240544cc0be/wuwekagodonomofuxa.pdf In PDF document text
    • http://magicdiscoradio.hu/userfiles/file/25542432737.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608755015184a---39048866797.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/af0bd33892a7fc4cc2569759ed86713e/pelutapoxalu.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/zasom.pdfIn PDF document text
    • https://longhoang.vn/upload/files/53245131843.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a790253426---xedowikobadapuse.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44a7c74ec---83841564556.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2fd8841a6---47684814324.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/wepineravunigodedidufer.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086f00332ef1---nuxolowikositogoxinezuvap.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/m6ph4jhs2840phpsdgr48ihl5m/92205352809.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/991c287f51a41da8db37701a96c0c357/23283227702.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/90878296563.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/mevekaziwedepedari.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/5c3f06a8fcb07dd08b8c326cec42b46a/kolanidawaresawivawovuz.pdfIn PDF document text
    • http://blueyee.com/upload/file/181412535102.pdfIn PDF document text
    • http://sghscsjamarai.org/guruhargobind/userfiles/file/lezebebajave.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608737a78074c---8159000602.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/63790873096.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160da1728d062a---93780717784.pdfIn PDF document text
    • https://techson-cctv.com/upload/file/wamovemolozetujewopuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=calories+to+eat+to+lose+weight+calculatorPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D88 10624 bytes
SHA-256: 1628e3f78ee7a34b7648ba82afdc864c5a92626e7c0f5e013166cc8c5347e265
font_02_sfnt_off00014616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14616 17788 bytes
SHA-256: e9df8cb2cf46edf5f65609c83ef383d5c47187fa652b4f5d4e8aad3e399fb284
font_03_sfnt_off00016147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16147 17288 bytes
SHA-256: 65ea6431ab56c741733cfebb84215835021758a3b0328875cf94d14a2f52daeb

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