Malicious PDF — malware analysis report

Static analysis result for SHA-256 039d0a8e5a245a5c…

MALICIOUS

PDF

87.0 KB Created: 2021-07-15 17:43:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 32ffa676718b94b220420a9353255081 SHA-1: ff27971dab3208f88ffde0440a074446ab471384 SHA-256: 039d0a8e5a245a5c880d8256cb6e71e1a851317e047252ab5273f30aed0cb0f5
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The sample was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links to potentially compromised WordPress sites and other disposable hosting, suggesting an attempt to distribute fraudulent documents. The document body, though truncated, indicates a lure involving prizes or funds requiring courier delivery, consistent with phishing and advance-fee fraud schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://braciszewska-klimek.pl/fck_files/file/bodavoteranuvedajaruki.pdf
    • https://topclassgreenery.nl/images/file/finurolarej.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f9007d645---87847866381.pdf
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/jaramaregabetonemolor.pdf
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5196a8197---41712625406.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88ec7e894e---robalavadifebas.pdf
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/f5jpef1gd68mj2g7vi2n1022og/52317489519.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/9baefcf029a2a67086409442f89d836d/pezidevafujojatusoguwug.pdf
    • http://leebyunghun.org/new/upload/board/files/revevisapolenurogo.pdf
    • http://asijskepotraviny.cz/files/file/miziredijatapolulazedagu.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee6c7c8959f---bajapamezoxizipiwugobosen.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b99b4e835---dolasi.pdf
    • http://jjinline.org/file_upload/file/ravapobagi.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cceb41c3041---98364111742.pdf
    • http://omni-links-europe.com/10353911827.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4282b394d---zirog.pdf
    • http://cmtsport.com/pliki/72695641618.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607620ac62b4b---59360817377.pdf
    • http://jatyn.cn/upfiles/202106/file/1624381302.pdf
    • http://dobrasekacka.cz/userfiles/file/nawogume.pdf
    • http://raykingcarroll66.com/clients/2/29/292092747e06e0ab09130fa737b110c0/File/jagimafoxaduf.pdf
    • https://infoenergie-loire.org/userfiles/file/7024253580.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=driving+licence+application+number+search
    • 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_off0000ee1d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 16792 bytes
font_01_sfnt_off0001062f.bin
56b4a6cea40e54692a1c3ac00533b80dae7475dc64df326e420376c0c9f88e12
pdf-font-stream PDF embedded font (sfnt) at offset 0x1062F 17976 bytes
font_02_sfnt_off00013525.bin
512f38e93cfb2633272c1582da910153d6be58c58d55b433fa2cf08ce87b16b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13525 11128 bytes