Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ebf096be3349089…

MALICIOUS

PDF

76.1 KB Created: 2021-03-30 19:27:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc03ee5673b1027497ad94fbbb6be0c3 SHA-1: 7489f1d7619d0bd66b9e226cc36c3a936226af04 SHA-256: 3ebf096be33490896d4db8bea004542ef60b671372a090e167865e5d8c30550b
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, with a specific heuristic identifying a 'PDF_SEO_LINK_FARM'. The primary malicious URLs identified are vilenefex.ru and namafafiteg.mypressonline.com, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/wix?keyword=mobile+hotspot+apk
    • http://namafafiteg.mypressonline.com/vasidijat.pdf
    • https://wowaximemufa.weebly.com/uploads/1/3/1/4/131453960/eaf98.pdf
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/c61c6dbfdef.pdf
    • https://bimexojagof.weebly.com/uploads/1/3/4/6/134655387/gumiwonupotafi.pdf
    • http://nakodinita.scienceontheweb.net/dosugazomaruvo.pdf
    • http://xezixaz.getenjoyment.net/biosecurity_act.pdf
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/5962882.pdf
    • http://niwadeg.mywebcommunity.org/81908144563.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lewuli/zumesawabalola.pdf
    • https://s3.amazonaws.com/mujevubutukoxu/fugibiresipusuko.pdf
    • https://s3.amazonaws.com/rabewiruzitewa/pokivofobivupujefuvejirim.pdf
    • https://s3.amazonaws.com/pogolo/86863284733.pdf
    • https://uploads.strikinglycdn.com/files/9c27fc2e-ea62-4e64-a589-a0ede5d7b19a/bimuxotuxoviwagus.pdf
    • https://s3.amazonaws.com/baxadelefofibuz/archetype_cards_caroline_myss.pdf
    • https://s3.amazonaws.com/jopomodilamego/petetod.pdf
    • http://fidalanono.myartsonline.com/60266851491.pdf
    • https://uploads.strikinglycdn.com/files/b297bf85-8198-4bcc-8328-f8e94cebea50/honda_eu3000is_parts_list.pdf
    • https://uploads.strikinglycdn.com/files/726e94ba-63d4-4192-9a79-38ff5ce9e30c/kosatemubupetomu.pdf
    • https://s3.amazonaws.com/jeworurowam/17356714751.pdf
    • https://uploads.strikinglycdn.com/files/3424094c-4efd-45ca-96cc-fe2829ae1ee2/51952675192.pdf
    • https://s3.amazonaws.com/robumuduluwise/jutumukogun.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
    • 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_off0000cca4.bin
ca5485bd6c5bb2b5146ef48912cc9ee5b5411eff118a054eda5aa3b1b6a7fda0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA4 5020 bytes
font_01_sfnt_off0000ddb8.bin
ffce4d2a46cf24d67a1e9e593a4dd4d79986653af551a4fe07584b6596e08a71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 18964 bytes
font_02_sfnt_off00010bc7.bin
2c9e863f11b379faabf69e1ed0b53067c9f1f6bfe285d91870585e054dc373f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC7 16312 bytes

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