Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1dbb06b07603b3f…

MALICIOUS

PDF

77.5 KB Created: 2021-04-30 16:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dd13296f9b5ec3b239c92073febac681 SHA-1: 264e95049b7a143b4ec1baa44b80e8b893a84c60 SHA-256: d1dbb06b07603b3f7ea7b8ceeadf26fd8f38e6c6b07da8fdaa5a78d54ceff02b
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm used for phishing or malware distribution. The document body, though partially corrupted, appears to be a lure related to a user manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://lozipotod.ru/strik?utm_term=new+nintendo+3ds+xl+user+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fe293e77920f.pdfIn PDF document text
    • https://tafajasezo.weebly.com/uploads/1/3/4/3/134312542/sovege.pdfIn PDF document text
    • https://bisenazogogo.weebly.com/uploads/1/3/4/6/134686343/lajuxasabu.pdfIn PDF document text
    • http://selafakokag.22web.org/chungking_express_1994.pdfIn PDF document text
    • https://teligodinawam.weebly.com/uploads/1/3/4/4/134457670/ce37bca51f892b2.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/2297821.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417995/normal_5fefaa1741331.pdfIn PDF document text
    • http://ketorebagibof.22web.org/orchestrating_winning_performance_imd.pdfIn PDF document text
    • https://pajuxosam.weebly.com/uploads/1/3/0/9/130968950/dikigikola_lujegemogasakem.pdfIn PDF document text
    • https://sezorataxij.weebly.com/uploads/1/3/4/6/134600708/musisezegelira.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_833c444308cc47478b1355249b3caa59.pdf?index=trueIn PDF document text
    • https://9df6e0af-a028-4e88-91ba-61a1b37318d5.filesusr.com/ugd/7c1f05_cb3ce6e4087d426181f6a6a770f13314.pdf?index=trueIn PDF document text
    • https://619c993e-e215-4b07-891b-88776ecab8c8.filesusr.com/ugd/1fce43_fee55bc4f107419fa1082e55b79250d2.pdf?index=trueIn PDF document text
    • http://pigosoj.epizy.com/fed_up_movie_notes_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/xotabodoxasoxatirimo.pdfIn PDF document text
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_21c08517fa6b4d40a238158b576266f8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/is_a_simple_favor_on_netflix_australia.pdfIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_5015f7b8025449f6b008f197f2cb824e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/apush_period_3_timeline.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/xotiragoxupaga.pdfIn PDF document text
    • http://kijijagasakum.rf.gd/test_brazelton.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_off0000f0ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0ED 5264 bytes
SHA-256: 0fa97683f3824faa88f8fc5a4663c48d2734a19a66e7a7e8e6c32ca11e3d5515
font_01_sfnt_off000102d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D6 11120 bytes
SHA-256: c0cf2c78fd7a3b2a7ec7671b5e5dced3df6e1ee9928bdd1c7b1530a0ddfa5ac1