Malicious PDF — malware analysis report

Static analysis result for SHA-256 132cb226ddefa6d5…

MALICIOUS

PDF

86.2 KB Created: 2021-01-09 19:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f6d73e28c6d9f3aea300c2b9d65979d5 SHA-1: 7d685f758207cc1d7f13e5eaae000454d4860977 SHA-256: 132cb226ddefa6d5cdb58dd3db965442d1fad74db168d5f36a9bea27b7f1322b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically indicates a large number of external links, with one pointing to 'tidemipevu.weebly.com'. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external links suggests an attempt to download or redirect to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/123?utm_term=dihybrid+cross+worksheet+answer+key+guinea+pigs PDF link annotation
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/6592166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_5fe75e0042a7a.pdfIn PDF document text
    • https://zavegaligap.weebly.com/uploads/1/3/4/4/134499553/1481306.pdfIn PDF document text
    • https://site-1177018.mozfiles.com/files/1177018/water_shooting_arcade_game_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468814/normal_5fbc32a2d4565.pdfIn PDF document text
    • https://gepadera.weebly.com/uploads/1/3/0/7/130740344/797b104ca853c9c.pdfIn PDF document text
    • https://site-1173313.mozfiles.com/files/1173313/losezodef.pdfIn PDF document text
    • https://site-1176622.mozfiles.com/files/1176622/16339351111.pdfIn PDF document text
    • https://site-1192291.mozfiles.com/files/1192291/mevolofak.pdfIn PDF document text
    • https://site-1171851.mozfiles.com/files/1171851/dead_zed_unblocked_6969.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/rebesudanolo/new_bollywood_movie_mkv_file.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/laddu_gopal_bed_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/uc_browser_for_windows_phone_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/walmart_twin_bed_sheet_sets.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/58926555194.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/bupajekuxotexin.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_off00011506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11506 5700 bytes
SHA-256: 667ae960a0928090f6329c75fa2c848175ef561b4e949679df794945ebe17f46
font_01_sfnt_off00012888.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12888 10376 bytes
SHA-256: f8a0f84779852c1d4a5e9db5efba5fb355716fbf007f96d071e9ef58e95ca5d4

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