Malicious PDF — malware analysis report

Static analysis result for SHA-256 967ef3a48e434445…

MALICIOUS

PDF

76.9 KB Created: 2021-03-24 05:02:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c3c53b8d179455b6f84d051541fe9a2 SHA-1: da0fa05679d50a07fcde911e4ca717be10d926ea SHA-256: 967ef3a48e43444520fdd43fbe9c65df49c89605618017a1546706f32035f8b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous external links, a common tactic for SEO poisoning and phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The embedded URLs point to suspicious domains, suggesting an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/wix?keyword=hansel+and+gretel+movie+2020+release+date
    • https://waxutawuvesi.weebly.com/uploads/1/3/1/4/131455398/4544048.pdf
    • https://jowetetezuvam.weebly.com/uploads/1/3/4/7/134717416/526bc2e3d409b2.pdf
    • https://bowalizixoled.weebly.com/uploads/1/3/1/8/131872289/gegogerimusamig_balosos_kuxixiju_kexepobupuwo.pdf
    • https://cdn-cms.f-static.net/uploads/4418199/normal_60273d3a1dd54.pdf
    • https://fozonened.weebly.com/uploads/1/3/5/3/135326763/bb511ef8b.pdf
    • https://cdn-cms.f-static.net/uploads/4370547/normal_60159be532a79.pdf
    • https://cdn-cms.f-static.net/uploads/4405899/normal_60539d1210295.pdf
    • https://zoluwapipapak.weebly.com/uploads/1/3/5/3/135321816/zuvitetasexama.pdf
    • https://fubaxegadajud.weebly.com/uploads/1/3/4/4/134454669/nikanonuvuwegiji.pdf
    • https://tonurokekar.weebly.com/uploads/1/3/4/4/134456200/f7bd74948.pdf
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/907672f01a90.pdf
    • https://cdn-cms.f-static.net/uploads/4449630/normal_60469e00d13d1.pdf
    • https://fejiwapofiji.weebly.com/uploads/1/3/4/6/134699364/fesujinelukil.pdf
    • https://cdn-cms.f-static.net/uploads/4487625/normal_60474981d8024.pdf
    • https://nugobobunebiset.weebly.com/uploads/1/3/5/3/135303429/4345833.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bivanud/the_amityville_horror_full_movie_free.pdf
    • https://s3.amazonaws.com/silubebebefuju/5415012535.pdf
    • https://uploads.strikinglycdn.com/files/a05b321d-566e-47e4-86c8-b6195dfb5e11/72995956234.pdf
    • https://s3.amazonaws.com/jivuxo/chemistry_practical_class_11_tn.pdf
    • https://s3.amazonaws.com/bupesejirijejus/neverending_story_cast.pdf
    • https://s3.amazonaws.com/xiwevitox/8940389034.pdf
    • https://uploads.strikinglycdn.com/files/a0dcb64b-e31d-4c33-8d87-64bef10f4e24/vowixuju.pdf
    • https://s3.amazonaws.com/desenaz/bluestacks_3_apk_for_pc.pdf
    • https://uploads.strikinglycdn.com/files/e4443ff3-1335-43e2-94ca-bc1251284b94/rujivabodisike.pdf
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee4a.bin
eb467a27eb09d7d6c0f0fb4bff085fba426d5f0d89d266c733231be7fa616dbb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4A 5440 bytes
font_01_sfnt_off000100b4.bin
41b740ea01a5fa1bb74cbe55961aad42f9ec88a9d6af5b99fc0f6a519835df56
pdf-font-stream PDF embedded font (sfnt) at offset 0x100B4 10816 bytes