Malicious PDF — malware analysis report

Static analysis result for SHA-256 033aa14adb421300…

MALICIOUS

PDF

94.6 KB Created: 2021-06-26 03:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29d750651e19f3f44b4b7429d7d2c607 SHA-1: e8a2ecf98e8b53b18d1e222ae5894cd07c44f1a2 SHA-256: 033aa14adb421300c3464abdb2c6461b5cc57f83ee81800dea038c6b8f37d832
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO poisoning to redirect users to malicious content. No scripts were extracted, but the presence of numerous suspicious URLs points to a content-driven attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://cadeco.com/testingsites/advantage_aviation/assets/media/file/fedunuwiberozij.pdf
    • http://kpotplace.com/uploads/files/23510886868.pdf
    • http://peaceinsrilanka.lk/userfiles/file/7885865195.pdf
    • http://kameleonhastanc.hu/files/file/morodejiza.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/5s5gsoh1fiu2i70tg3ol5iruh7/99391838740.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/j1ngh0e1d68ro2hv5aah64ne93/xipelesuvufoxezoxe.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/53a07f844900991430f77b8738d91654/lovemijuvuzowavamesagag.pdf
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/86d67db0b9cf9257963768b721d384bc/sepemanuvunaj.pdf
    • http://alibabashipping.com/userfiles/file/1062401307.pdf
    • http://novussiteyonetimi.com/uploads/file/42398493232.pdf
    • http://www.bluewhaleline.com/image/upload/File/risupufagalasiletubizu.pdf
    • https://deltarents.com/upload/ckfinder/files/xibomodop.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/5b40ec1c6fde632fd51761acdb264b19/37497547064.pdf
    • http://vieclamquantri.net/upload/files/sixusejifitisibukal.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/39db54af4c3098340394938380b2cde1/22869141408.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/3vanmfp60uii18nnv3jh1bbs5c/61363347874.pdf
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/tudolimakirasita.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16088593d0f142---rujasepemozuj.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/5805e51e139253ab15e9cfafa42d7bfe/pororajoxabepibox.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/kraskhjql48c9vcf04tk6aiolf/72006498322.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/porl3nb1a772s0r17qvkvi8ob7/luvisabeg.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/37jfmc4crjlkoh8ohrhlrdtc04/wewukujotima.pdf
    • http://www.truca-taoules.com//ckfinder/userfiles/files/25277825041.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=twisting+questions+with+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_off00010d19.bin
7d9cbad6cc1013dbb56dbff7e697871d412e9e2122e787280a63a2a9a0baacec
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D19 10636 bytes
font_01_sfnt_off0001252a.bin
681a3aa071d7111c88770bf049886f0a6363166e831f3ad35bdefbbbd8b96d28
pdf-font-stream PDF embedded font (sfnt) at offset 0x1252A 17796 bytes
font_02_sfnt_off000153c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x153C7 16792 bytes