Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bcc875d2bd0bfa9…

MALICIOUS

PDF

96.4 KB Created: 2021-03-20 12:37:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d4cf781e360b46ff990932bf18cbe8e SHA-1: ecb9a7d211353ac47af4d08118e83c29fcc47d89 SHA-256: 4bcc875d2bd0bfa95853a6decc87e752446d8ddd988a2dff7f523605196f3773
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a mass of external links, with one suspicious URL (jottigo.ru) likely serving as a lure or redirector. The document body, though heavily obfuscated, suggests an attempt to disguise the malicious intent by presenting itself as an 'advanced manual' and includes urgency language, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=hh+obd+advanced+manual
    • https://bagibobujinokat.weebly.com/uploads/1/3/5/3/135312275/1de931222701.pdf
    • https://madaremowigefin.weebly.com/uploads/1/3/2/6/132681361/pulilotug_kijapadoru.pdf
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/pumabanu.pdf
    • https://givunanisu.weebly.com/uploads/1/3/4/8/134848628/2714506.pdf
    • https://sivisobimiji.weebly.com/uploads/1/3/4/7/134754783/fizaguvosazesesar.pdf
    • https://zemotererozo.weebly.com/uploads/1/3/0/7/130738962/jajisuwawij-sodifuzuf-mefivelapiziga.pdf
    • https://fofomakizu.weebly.com/uploads/1/3/0/7/130775640/61d7c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_16077a8aae184492aa566c3630bbeb2a.pdf?index=true
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_053f514b859a4e2da6ff78a143838573.pdf?index=true
    • https://s3.amazonaws.com/jazofi/lg_inverter_v_swing_not_working.pdf
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_dc5c5224279642f88e1411bd997d1d14.pdf?index=true
    • https://e1d5fa5a-667c-4d22-bb72-2ec96b4ed0f7.filesusr.com/ugd/01f30d_3b844b7ddd19445698f527c7921994b1.pdf?index=true
    • https://s3.amazonaws.com/ziwuvijevo/32112078490.pdf
    • https://676a7a22-5bec-432e-92e0-9d4a0a27851c.filesusr.com/ugd/a1fb72_ef99fa286e6944c39ce603d857a72e96.pdf?index=true
    • https://s3.amazonaws.com/wazorixekunafob/whatsapp_for_nokia_206_latest_version.pdf
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_cf364228890848408d2abb892e10826d.pdf?index=true
    • https://s3.amazonaws.com/bufipevuril/74452208770.pdf
    • https://8c4778c4-ed17-4cf1-86f9-5448e21c5c15.filesusr.com/ugd/6da380_0e74b0ea2afe49d2835344440b62f1f5.pdf?index=true
    • https://s3.amazonaws.com/pavujiniz/how_do_you_program_a_craftsman_garage_door_opener_keyless_entry_pad.pdf
    • https://s3.amazonaws.com/fulazelof/bypass_apk_samsung_j2_prime.pdf
    • https://0dc5016f-38c0-4e11-84f4-4717e3ef4ec7.filesusr.com/ugd/4fd84c_c80d6cf9e7f54e398c4408d0f553c279.pdf?index=true
    • https://s3.amazonaws.com/wexukufedepim/how_much_does_a_sable_coat_cost.pdf
    • https://f6e2a16f-d004-42cd-8f17-0463e090774c.filesusr.com/ugd/c70c35_ea81ed37d03d4848970d590a3a29879d.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_off000138d4.bin
319debc360f9bbfb2f59f27d1c4dfcd8247bcf2ee3216f948943b4193d4effcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x138D4 5068 bytes
font_01_sfnt_off000149ee.bin
c72940ec303a94f1147e3439355fdae05a41839eb3e673595492dbfa7cac5504		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149EE 12504 bytes

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