Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cc7d333c660a72…

MALICIOUS

PDF

74.7 KB Created: 2021-03-09 19:12:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 608356aa44027af8cb0608a585eeec6b SHA-1: b75f549df981849cccfacba5b32abd184979e7e4 SHA-256: 74cc7d333c660a726281e9f2010c7b9a1f6513aee9403fa2467001e379a263d6
112 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a redirector, with the 'utm_term' parameter suggesting a search lure for 'play store karo'. The document body, though heavily obfuscated, contains metadata indicating it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the idea of a web-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?utm_term=play+store++karo PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5ff13f6619a44.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/0b7a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_602aeb5b5d062.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451230/normal_5ffb19f70269f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383571/normal_5ff89271e9bab.pdfIn PDF document text
    • https://lapenemelibi.weebly.com/uploads/1/3/4/7/134708636/latewamino.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455377/normal_5fed4159dcfa7.pdfIn PDF document text
    • https://warodimaziwini.weebly.com/uploads/1/3/4/6/134611971/tipotirexafobepopedi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450732/normal_6005fad150fbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479688/normal_601e23b2db80b.pdfIn PDF document text
    • https://pezomivagijo.weebly.com/uploads/1/3/5/3/135392772/juremekevalugixedogo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414695/normal_5ff4302810720.pdfIn PDF document text
    • https://gerukule.weebly.com/uploads/1/3/1/6/131606739/bavukejukajan-sabowokox-roteli-rosonuni.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/rujabepifar/aadhar_card_update_form_through_post.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3da6bc8f-dda1-413f-a761-27c082ed822a/quicken_patch_2015.pdfIn PDF document text
    • http://belomaruterimos.epizy.com/software_project_scope_statement_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b923bae8-d743-42e0-9760-22aa8786ea74/does_suntrust_charge_for_incoming_wire_transfers.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/42433582449.pdfIn PDF document text
    • http://wefazor.epizy.com/81283816549.pdfIn PDF document text
    • http://bafopivazizaxon.rf.gd/marlin_model_81_scope_mount_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/anjali_anjali_pushpanjali_telugu_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a0721ea-2af7-4221-be73-e6a617090bf4/what_does_an_aviation_machinist_mate_do_in_the_navy.pdfIn PDF document text
    • http://sotilikesad.epizy.com/android_tv_set_top_box_singapore.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/8816656396.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_off0000e8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BB 4848 bytes
SHA-256: 881d02e7d0e3db46ef4810458f1bcbf6e1dc0219837536fe26316796a66bd3bb
font_01_sfnt_off0000f94b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94B 10728 bytes
SHA-256: b672b6df0337dbf5877d3435437888cec69e522e19cb84e026b484b25d803de4