Malicious PDF — malware analysis report

Static analysis result for SHA-256 6690d27ec1c53a68…

MALICIOUS

PDF

68.8 KB Created: 2020-12-07 19:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: b37d8f8380d809ec138201eee8ceaad7 SHA-1: 1d50a7f15cb464f525049befdee46c20df1f9465 SHA-256: 6690d27ec1c53a68fc334c51ae202d8da33570faa367c6b2af02435724a791de
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on strikinglycdn.com, suggesting a link farm or redirection scheme. One of the embedded URLs, 'https://traffking.ru/123?utm_term=pcsx2+damonps2+apk+download', appears to be a lure for software downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffking.ru/123?utm_term=pcsx2+damonps2+apk+download PDF link annotation
    • https://favesalaliba.weebly.com/uploads/1/3/1/3/131384568/7038008.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/13cc6c48-4a8d-4bdd-abad-5f91282ea525/60145058752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352e9677-dbde-4527-be0a-867635474085/59126894108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ae6961-b0f7-4888-af5c-bd8ce759b4f5/gifafulinadetaxirokuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f86b2aab-f7f1-4bdd-a8c4-dc5935be3575/46619251152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/459cdda3-31a9-4d90-bb45-a4888224dae1/playing_cards_in_cairo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc115bd5e8e827d428ee316/t/5fc3504dcb3e0f5771ba64b5/1606635600131/conceptual_physics_12th_edition_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/album_jet_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12af63dfdd95b60d6c240/t/5fc34bb3173fb5383b0d4398/1606634419767/allen_high_school_stadium.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/6054429966.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/zugujibebolepokepisiwuru.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dfe77d0c8f249d40ab54/t/5fc2c2c75147b148048da8ac/1606599368391/aviones_de_guerra_mexicanos.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD059 5480 bytes
SHA-256: fabd1b2fe1ce002205e4b9d21b4bae787a773663eb0511c595e0d1da6caa5009
font_01_sfnt_off0000e308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE308 10468 bytes
SHA-256: aff4521305b37671adeefcb69f2359eef6df797b4661f234132b28fa48d28fbe

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