Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1dd006ae03cf521…

MALICIOUS

PDF

108.1 KB Created: 2021-07-03 23:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 4e14bd6d4223a9961c9079c4e5a1ac96 SHA-1: 8db485005d48ba9864f92440673487cea81aa281 SHA-256: e1dd006ae03cf521630d04a3527187c3009963fb86cc95b601eb2a85dd3cdb36
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions to download a password-protected archive, a common tactic to bypass gateway security. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the overall structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe1d90177e---4579436286.pdf In PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4b6d5e3f1---defumexarevu.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/zuviguwuda.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/e86751d29229e3f21853081e18ca4be3/99867700498.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/kinodomoro.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/c123ac75e174f3651b55f7fc36c926f6/dutinoxometulubafogal.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/cq87s7gltd85bsvbb6vh1q8hn1/fupitinok.pdfIn PDF document text
    • http://szentdorottyapatika.hu/files/62201150270.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/69397500071.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/13663753305.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/47fvd1ok59e279hcg0fgl9qt8m/38492902893.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a78baf18a---jorubegidurew.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/82806977532.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/31030407328.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/qmhk4p2kjbsrmudo1lnbe17938/26373150047.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/lazuweririrovibo.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/e9d8ad850b1bec92c2f7871b727d60f5/duxomoniwogeruzeki.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/22074629565.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c4420bc3f54---99661951429.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/agidih4uiu850edl32lq2qedo7/11837167928.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/75cd422b277f271cc29c5aa09b397a08/89076124963.pdfIn PDF document text
    • http://yonseri.org/userfiles/files/55009527662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=highway+engineering+and+traffic+analysis+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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00017e88.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17E88 20388 bytes
SHA-256: dd74f70c39d24fe3271f8a16c5917cf616d628306a313a9d4e328026cbe5613c
font_00_sfnt_off0001200d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200D 17192 bytes
SHA-256: 5e600118ab59dcafd9678694afe90091720ab41b749a92217ba42d91d1f2969a
font_01_sfnt_off00014d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16553 10968 bytes
SHA-256: 4858c422af147dac2e32ec43996e6163fa4cb11301e7fc511d5b9052664da707

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