Malicious PDF — malware analysis report

Static analysis result for SHA-256 4200cad1de644046…

MALICIOUS

PDF

131.4 KB Created: 2021-02-06 16:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: c5c6acc7ca8216a96b7f3119743f79bd SHA-1: 22d5429e4dc61016225a96797a77c222d79165dc SHA-256: 4200cad1de644046493a6a2c505d5b96593d6b03907c09d2724a8cba474bc011
244 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and flagged as part of a link farm. One critical heuristic indicates a direct link to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 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://yafferge.ru/wb?keyword=fuel%20economy%20guide%202015 In PDF document text
    • https://cdn.sqhk.co/nilimijano/WgdQRij/mejijukiw.pdfIn PDF document text
    • https://fuwewarudizikip.weebly.com/uploads/1/3/4/6/134644733/buneguruwipojat.pdfIn PDF document text
    • https://wupumemugate.weebly.com/uploads/1/3/1/4/131407036/50228.pdfIn PDF document text
    • https://cdn.sqhk.co/tatomaxeriri/eidqk9K/simple_birthday_decoration_ideas_for_baby_boy.pdfIn PDF document text
    • https://bopovajo.weebly.com/uploads/1/3/5/9/135966354/kiveniwejoxiwe.pdfIn PDF document text
    • https://mejavepo.weebly.com/uploads/1/3/1/4/131438157/0f3499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373526/normal_5fde69a11e018.pdfIn PDF document text
    • https://kiwiwutirove.weebly.com/uploads/1/3/4/7/134707888/rexefatum_zemipodo_wefiwisegusi_vazifi.pdfIn PDF document text
    • https://cdn.sqhk.co/dolavalof/s6hcyhg/86880937152.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/wihjdii/gt_car_racing_stunts.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404122/normal_5fde9db3d9a9f.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/cduhb2X/nuwaz.pdfIn PDF document text
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/losuzagitojesil.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/p3jg8xa/download_game_dragon_hills_mod.pdfIn PDF document text
    • https://sedanafijokam.weebly.com/uploads/1/3/4/8/134888359/fizita.pdfIn PDF document text
    • https://tuxuboninivufos.weebly.com/uploads/1/3/4/4/134478209/2185373.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/i8ghdVJ/flip_flops_men.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/ultras_game_mod_apk_apptoko.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/familial_cerebral_cavernous_malformation_symptoms.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/92553811023.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/alamofire_image_swift.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ace8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ACE8 5284 bytes
SHA-256: 1b6918d50ba2d26ed6b45829086abfe127b83867473edcdb40cd0f48d7ee22bc
font_01_sfnt_off0001beed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BEED 13160 bytes
SHA-256: a9c5a0b36e7b65a91bc8bd5bfc4793991c1272b92538a2018ead66fcb0420c0b
font_02_sfnt_off0001ea3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EA3E 16192 bytes
SHA-256: 2fbb528c30fae61c70ff4082faa5fece981988df10abad1a91cab371b780b9de