Malicious PDF — malware analysis report

Static analysis result for SHA-256 94191627ae8f71c3…

MALICIOUS

PDF

156.5 KB Created: 2021-04-19 08:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0abb24dde0cbfc65d213c8ca99b551af SHA-1: 37107b9a1ec8fd58bdd6e1fe9185f753694d51d3 SHA-256: 94191627ae8f71c3357c89a0291ddeaf190ae13a27be4fc4ec5110374fd8c9aa
116 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic specifically points to a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a phone number. While no scripts were explicitly extracted, the presence of external URIs suggests the document may attempt to download or redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://ponafet.ru/strik?utm_term=and+they+were+not+ashamed+scripture
    • http://igbusinessabouthelp.com/kubovozomamufebukeniiajhk.pdf
    • https://cdn-cms.f-static.net/uploads/4462726/normal_6046fca83bc23.pdf
    • http://shoop-fe.ru/56131033423m24vh.pdf
    • https://static.s123-cdn-static.com/uploads/4371266/normal_5ff522160fca8.pdf
    • https://cdn-cms.f-static.net/uploads/4448113/normal_601b0ff6e4b20.pdf
    • http://alcozerox.com/galaxy_note_3_launch_date300wb.pdf
    • http://b2b-servis.ru/asus_rt-ac66u_review_2020bwcsz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c1b35f1a-a33f-4136-ac65-11319e9efff4/mumuzitotogi.pdf
    • https://uploads.strikinglycdn.com/files/0683e87f-37ce-4014-b7a2-0511b152db27/how_to_get_control_lock_off_whirlpool_duet_washer.pdf
    • https://uploads.strikinglycdn.com/files/88035bb9-74ef-41e0-ade9-0295423aa0bd/tepokazazudap.pdf
    • https://s3.amazonaws.com/jonora/bonitas_hospital_network.pdf
    • https://b32521b7-32ca-447e-9967-d27d0dce683d.filesusr.com/ugd/800b88_3723c2a9ce3848b0b34685764492020a.pdf?index=true
    • https://s3.amazonaws.com/fokapikow/xotowagup.pdf
    • https://ff536187-e25a-4bd2-965b-ff1113cf40b0.filesusr.com/ugd/bfcccc_aaf47401020c45588d782f1220e7f80c.pdf?index=true
    • https://305aa2e3-e1d2-413d-aa2e-f1bb83d03ded.filesusr.com/ugd/92ee2b_c56f45713976474a8cef547befe60508.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8d413ae7-3a32-4336-8d56-84e840e49319/shark_cordless_pet_perfect_lithium-ion_handheld_vacuum_-_lv801.pdf
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_789dac69041a45aba7291e88208f0ac4.pdf?index=true
    • https://5de6e22f-064f-4859-b003-4eaa502c5056.filesusr.com/ugd/2609e6_a0c1e064dbeb4a7cb6f5a3cf366cc45f.pdf?index=true
    • https://s3.amazonaws.com/liluvad/what_is_the_authors_purpose_in_aint_i_a_woman.pdf
    • https://uploads.strikinglycdn.com/files/288e5861-fec9-45ac-8666-8c709e360508/27205686892.pdf
    • https://356bbf58-84af-4bff-99a9-d03346e46411.filesusr.com/ugd/b5472a_d3fa5dec743046e399eb3a876501e187.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020e2f.bin
369311929e3922a832d38926beb97045e43148c554fb57521aa4e9439523761c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20E2F 5464 bytes
font_01_sfnt_off000220af.bin
b0f076a848fa9eb524424159d010ea856c0fd1f61accea95cd182a24cb9cab17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x220AF 25324 bytes

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