Malicious PDF — malware analysis report

Static analysis result for SHA-256 12a01e5ff8103d47…

MALICIOUS

PDF

82.6 KB Created: 2021-03-30 03:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cc972a3df16c19cfeec9d34fdbe5bdb3 SHA-1: 11a2e821829f045ef93d7b2ed076fb97e1a3f2fc SHA-256: 12a01e5ff8103d47600ca9b20f73a6573e126f1a708be6abc9331e16085e84be
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://leonvi.ru/strik?utm_term=attack+on+titan+game+play+free+no+download PDF link annotation
    • https://lupudeme.weebly.com/uploads/1/3/1/3/131378919/8520287.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/9373301.pdfIn PDF document text
    • https://pigasuranebuja.weebly.com/uploads/1/3/4/4/134459694/fikexafukolosabutev.pdfIn PDF document text
    • https://sonetevarepe.weebly.com/uploads/1/3/4/8/134851601/sonew.pdfIn PDF document text
    • https://gerikolobel.weebly.com/uploads/1/3/1/3/131398187/xozuwosi.pdfIn PDF document text
    • https://zagiwutexava.weebly.com/uploads/1/3/4/5/134501554/fuxemiki_rotuwagi_nuzebibati_vusidekuzuba.pdfIn PDF document text
    • http://nowefewafugaki.iblogger.org/14239354306.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://107a3552-ed21-4f5d-95e3-510b6eae4444.filesusr.com/ugd/21bbef_d557a6ae5bce4134bd9a49fe9cb3376f.pdf?index=trueIn PDF document text
    • https://4bd9ed84-c80b-4837-bb2f-b1353ebfd8aa.filesusr.com/ugd/5a1791_3f87de7976fe457e93d23291b22a4324.pdf?index=trueIn PDF document text
    • https://617ecdd3-9f15-4ef5-8539-b0e2931b4c86.filesusr.com/ugd/55f640_42ee90d4b27f42528e737b53d3c74e7d.pdf?index=trueIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_4e41e97286f141f08a87359144234e30.pdf?index=trueIn PDF document text
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_75521bbbc3a644b4a4c76aa538dcd52b.pdf?index=trueIn PDF document text
    • http://puzasapexuwuju.epizy.com/great_cv_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/rivozuda.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/wahl_clippers_set_canada.pdfIn PDF document text
    • https://d1b6b380-f15b-462b-86b5-0b089ba7d90d.filesusr.com/ugd/f99a33_f2e602a247634ea6914967859d503915.pdf?index=trueIn PDF document text
    • http://punegejofuj.epizy.com/21932575706.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_off0000f57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57B 5332 bytes
SHA-256: 1888aaf0cb9772719ab143b586cf126ff8607c122ba469446f7838b01da2f15f
font_01_sfnt_off0001079a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079A 11556 bytes
SHA-256: d4befd7470d5e1787c0f098c3d44ef7b0bbce81f808adc661ce2b6cd6b98dddc
font_02_sfnt_off00012f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F0B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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