Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab88617f9a2a18d8…

MALICIOUS

PDF

84.3 KB Created: 2021-06-26 05:37:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7093157569027f02d0740293b54480bd SHA-1: b9a4706a8b74ec761d133e06398f22129d5fa04d SHA-256: ab88617f9a2a18d8faf3dc1b02be86bf4233b2da661c8cc7a366aa2c13f19491
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the nature of the link farm suggest a phishing or malware distribution scheme, likely involving a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://netiko.ge/img/Data/file/lugalikeb.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c6c9ab71f---10106039688.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/19299143233.pdf
    • http://spalovnachemolak.sk/userfiles/file/65668913193.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/2c7c2dcfcfd3a6bf01ba96ee7aa02e2c/96328098781.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/6e3e0a76fbeced3c20568e1c0dfad5a8/momodirizojaseme.pdf
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/5172e438d90370886ddc3e21ba2a9de4/pibomamikupu.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/c2lpgn4fdjv43l418dttriaupm/81147799059.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/96a882b6e72640bcca4c62d60af38247/72630219882.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/22626b816745e0a2196403531f74fc69/zixezojawitip.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3fac2a19f---zafasasemul.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/a54aea1bf7252a8f001724fba9d3da83/49517821557.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf05300a29e---64951674457.pdf
    • http://czdashan.cn/uploadfile/file/2021051005505773499.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608549dfa6743---puzibusefomipegagifat.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/c8f5509b694515261a5281fd5d717adc/57081613564.pdf
    • http://globalquestconsulting.com/userfiles/files/70302216122.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd55108c6b---80721685338.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16087ecd5cfb2f---86042253254.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/pidesepomegod.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/2kdor4iaqr34vc3mmv39hchql7/64275077644.pdf
    • http://aps-mes.com/files/file/moxususewajerega.pdf
    • http://eperon-kochersberg.com/img_db/48982688980.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d4d19ec87---dobovisuk.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=garbage+in+garbage+out+class+6+questions+answers
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CF 16792 bytes
font_01_sfnt_off0000fce1.bin
11bc7d46484fad5887af3704b42c053bfa244f33d8a21209f500d6ba05861044
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE1 17384 bytes
font_02_sfnt_off00012a6d.bin
f08da68d553c004f8c770ba5c47c2ed897e6c78e60856130f6d063202e798dd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A6D 11084 bytes