Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c773819e06805bc…

MALICIOUS

PDF

79.5 KB Created: 2021-03-04 12:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 4e6a6c7307ddc1aa6ae820eab96b99b9 SHA-1: e9de8ff585b5db1af7dfe44eaa82d65e20f5b303 SHA-256: 1c773819e06805bcceb5331c52f4299173dbbc39fae65dea660d370c8e0e88e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by a ML classifier and ClamAV, indicating a phishing and potential trojan threat. The document contains lures related to "sears protection agreement benefits" and employs urgency and callback phishing tactics to entice user interaction. While no scripts were directly extracted, the presence of external URIs and the overall heuristic profile strongly suggest the document is designed to lead the user to a malicious site or download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • 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://mezovuduw.ru/wix?keyword=sears+protection+agreement+benefits PDF link annotation
    • http://busibear.com/78157969497a6p0n.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/brown_and_tan_mini_dachshund_puppies_for_sale_shawano.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/what_is_the_color_mint_green.pdfIn PDF document text
    • http://universal-kirov.ru/ruger_sr22_problems_20182nc8r.pdfIn PDF document text
    • http://fresh-ita.fun/schumacher_charger_sc-1000ahzr0r.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/94250867914.pdfIn PDF document text
    • http://shoop-fm.ru/gun_shot_fire_war_apk_hile_indir52flt.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/classical_guitar_tabs_free.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/5943511.pdfIn PDF document text
    • http://freehookup.xyz/51544400116gltvr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jexititojule.rf.gd/how_to_measure_absorbance.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/video_recorder_program_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/jane_chaman_jane_bahar_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/lapupugutatewikabofixo.pdfIn PDF document text
    • http://feramivo.rf.gd/wanofalexowoviseziwojebi.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_off0000f800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF800 5544 bytes
SHA-256: 3f2ffdee68354577fd4e2d2131f57eb99c4ae0e54d77d51f43fcaff012daedc9
font_01_sfnt_off00010ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC1 11320 bytes
SHA-256: 2a4e947faef197953f56beb191e7c928367b5310dcb0e516a795685b09a102c9

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