Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fdeba49ed9c8cc…

MALICIOUS

PDF

75.6 KB Created: 2021-01-17 11:24:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7d5bd8d4923516ef3bcf28d0f962cd00 SHA-1: 102863fcc4dc63156033e6478ebdb8445ae81fd8 SHA-256: f2fdeba49ed9c8cc2e59f53527932a06bf3f8dc7937066492915f1c0b358df67
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable domains and potentially malicious redirectors, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The ML classifier and ClamAV also flagged this file as malicious, suggesting it's part of a phishing or spam campaign. The primary function appears to be directing users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://traffmen.ru/aws?utm_term=concrete+and+abstract+nouns+exercises+pdf In PDF document text
    • https://site-1201192.mozfiles.com/files/1201192/pitutalimumuvofero.pdfIn PDF document text
    • https://bijawodit.weebly.com/uploads/1/3/4/8/134883407/gemim.pdfIn PDF document text
    • https://variwigegepug.weebly.com/uploads/1/3/4/3/134348450/6657712.pdfIn PDF document text
    • https://site-1177421.mozfiles.com/files/1177421/eartha_kitt_santa_baby_live.pdfIn PDF document text
    • https://site-1171757.mozfiles.com/files/1171757/best_deals_vestige_mobile.pdfIn PDF document text
    • https://gasilarax.weebly.com/uploads/1/3/4/5/134595303/dilivibuxogurolu.pdfIn PDF document text
    • https://vexibalob.weebly.com/uploads/1/3/4/8/134896466/3734072.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/ee2664.pdfIn PDF document text
    • https://finolija.weebly.com/uploads/1/3/4/6/134625313/tiwarisupowotinabu.pdfIn PDF document text
    • https://cdn.sqhk.co/durotula/sjhfjdS/security_craft_mod_9minecraft._net.pdfIn PDF document text
    • https://mojipodo.weebly.com/uploads/1/3/4/5/134592530/kunifagix_jerurin_wiboladodak.pdfIn PDF document text
    • https://site-1172756.mozfiles.com/files/1172756/87704328776.pdfIn PDF document text
    • https://site-1178429.mozfiles.com/files/1178429/alegreya_sans_sc_font_free.pdfIn PDF document text
    • https://dixugoruvaweg.weebly.com/uploads/1/3/4/6/134616472/pewuwo-palut-pogusuvan-xobipomik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/cars_2006_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/joindre_des_ensemble_mac.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC53 5232 bytes
SHA-256: 1b97d73a8c63e1aef176bb1574f2bad857165735b9625db2fe8cfc897f849c84
font_01_sfnt_off0000ee22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 10908 bytes
SHA-256: 176d7f0c1bf335838ec53dfee182ccdf617018408c52bf6c2ab234d22864fda2
font_02_sfnt_off0001132b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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