Malicious PDF — malware analysis report

Static analysis result for SHA-256 e903841525e886c9…

MALICIOUS

PDF

72.3 KB Created: 2021-01-04 02:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2b159a97fa6d5c6213527633e83d8f46 SHA-1: 70f9cd879b2feab15d4418dc2631bf9172231a85 SHA-256: e903841525e886c9e4939af9115734751dc231ac1715f8646d196676cb90ec47
124 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a phishing and trojan threat. It contains an external URI pointing to 'trafftec.ru', which is likely a malicious domain used to host a phishing page or download a second-stage payload. The heuristics also indicate the use of urgency and callback lures, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafftec.ru/123?utm_term=salon+rouge+la+conner+wa PDF link annotation
    • https://cdn.sqhk.co/devurekon/fbARKhi/jimefepijipomipo.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/OjhoS0j/51988277774.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/5jijjp4/44680403698.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://s3.amazonaws.com/dejolavubukugeb/batterymon_battery_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f02775c-4027-4740-abf5-51a6224f7de5/fenesixizaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/probability_practice_worksheet_7th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e249b8-309d-461d-8a5b-e0b44b350b0c/kogarov.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/59618462163.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/steelers_vs_buccaneers_injury_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24d0e362-f3bd-4bbe-bcfb-802ae0e66500/pali_crib_recall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/770dc65c-5e05-466e-9194-fba0ff933a48/coordinate_grid_pictures_cat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3782dcc4-17c8-486a-9cb8-8021ffd67ce1/play_the_song_i_got_this_feeling_inside_my_bones.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/formal_operational_egocentrism_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/shakira_songs_naa_songs.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_off0000d043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD043 4736 bytes
SHA-256: b65d71c22154d21b6fd5ac25875de03ea8c61496f4a143cf4c96a15e8ba85f7a
font_01_sfnt_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 11208 bytes
SHA-256: 746274c234ab2329b942b1fc64f554b35c938832b1956a57af3002faf4a5a1c2
font_02_sfnt_off00010682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10682 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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