Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ecd1a917b824c4…

MALICIOUS

PDF

76.8 KB Created: 2021-03-26 06:45:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2dc54f64323df0d76091abd951854bdd SHA-1: a4fa4279b5c41212e4fb8f83144508147b9dd248 SHA-256: 01ecd1a917b824c46da4d2005ae9da62d4cda3818f0e72e1f4478aa1073abefe
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, 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 presence of embedded URLs and the PDF structure itself point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dugedepap.ru/strik?utm_term=is+monstrous+a+verb+or+adjective PDF link annotation
    • https://fimozafovobas.weebly.com/uploads/1/3/2/7/132741130/rokowibesukini.pdfIn PDF document text
    • http://fallofelin.online/maze_runner_3_full_movie_free_onlinef6e00.pdfIn PDF document text
    • https://gufubavofunopi.weebly.com/uploads/1/3/4/7/134704705/913a88bd4a726cb.pdfIn PDF document text
    • https://cdn.sqhk.co/jalexire/XdPjhus/lodad.pdfIn PDF document text
    • http://xonejalevesezom.sportsontheweb.net/does_stanley_tape_measures_have_a_lifetime_warranty.pdfIn PDF document text
    • http://fredo.bike/impossible_space_best_weaponsg7frb.pdfIn PDF document text
    • http://lexanizisujufum.66ghz.com/9899166649.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/3850773.pdfIn PDF document text
    • https://cdn.sqhk.co/seranowe/jdihmp2/12041780217.pdfIn PDF document text
    • http://bravos-kids.ru/98682008031zhzs9.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdfIn PDF document text
    • http://tiwegopoguxuzu.mypressonline.com/seventy_six_trombones_sheet_music.pdfIn PDF document text
    • http://usacreditscore.info/62437969846lnugh.pdfIn PDF document text
    • http://wugupomovupa.sportsontheweb.net/josurizebiwuz.pdfIn PDF document text
    • https://cdn.sqhk.co/wuluzajiroz/jdGhgif/century_21_store_closing_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/XifHlES/lucky_level_scratch_cards_lotto_games.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://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_8c58af2248334adc8afc354d5ca3ddbb.pdf?index=trueIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_8b9c6f919dff4087b72e32d68e33f154.pdf?index=trueIn PDF document text
    • https://f9c81679-ddb1-4746-ab40-32673edc426c.filesusr.com/ugd/2eff39_cbe59e7364684b959c92a6ac538ecf6a.pdf?index=trueIn PDF document text
    • http://zagusax.rf.gd/vebatijopekebopupuzu.pdfIn PDF document text
    • http://pigibotokaper.epizy.com/false_police_report_georgia.pdfIn PDF document text
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_b5dfdbccd851452eb4ce720150f012a3.pdf?index=trueIn PDF document text
    • https://b19b3b79-9ae2-4e99-9b16-ef32671d60f4.filesusr.com/ugd/0bc867_7aeff1d1ab2b492f8d155daa096b95da.pdf?index=trueIn 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_off0000dd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD11 5148 bytes
SHA-256: 30ebd97258141afd4e15a9a2c6eb234f1da89524355bf4f8f22aef5902a35886
font_01_sfnt_off0000ee76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE76 11592 bytes
SHA-256: 2b25bb836cdb077a445822d21d757d81c5e7985707e0bd3982420b51104bd2a8
font_02_sfnt_off000115d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D9 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3