Malicious PDF — malware analysis report

Static analysis result for SHA-256 2168dd9e71fd2fd2…

MALICIOUS

PDF

75.9 KB Created: 2021-03-22 05:28:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 062b5b71f647951127b5f16a66337340 SHA-1: 40031a18bac01935768293f4f1bc8bc1c2914e8a SHA-256: 2168dd9e71fd2fd2c50cebb5e356a7551aad4f6d604fdd4a64ed44151d0fe4bf
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing or link farm attack. It contains numerous external links, many hosted on disposable domains, designed to redirect users to other PDF files, likely for further malicious activity or to inflate search engine rankings. The document body, though heavily obfuscated, suggests a lure related to 'PDF password cracker free download', indicating a social engineering tactic to entice users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://jottigo.ru/award?keyword=pdf+password+cracker+free+download PDF link annotation
    • https://cdn.sqhk.co/lotidonita/hsichbI/21273458977.pdfIn PDF document text
    • http://rm-swis-mine.com/vovetavutojenakudejujjwokv.pdfIn PDF document text
    • https://luzenesezenobo.weebly.com/uploads/1/3/5/3/135307250/faginumofitejum.pdfIn PDF document text
    • http://bebinovixox.iblogger.org/novedag.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/aVbgcN2/ballet_dance_lessons_online.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/jhOrz6k/ropibiti.pdfIn PDF document text
    • https://cdn.sqhk.co/jaselavujuwi/hbifidn/lobajesisafalatamepegal.pdfIn PDF document text
    • https://cdn.sqhk.co/zapajugadira/h8XxCgc/36657376067.pdfIn PDF document text
    • http://naturalik.fun/21477444078856bp.pdfIn PDF document text
    • http://afracheat8.xyz/nightcore_free_download_mp3wmhwy.pdfIn PDF document text
    • https://wikumegi.weebly.com/uploads/1/3/1/4/131407968/1623641.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/jgTijgi/74027561550.pdfIn PDF document text
    • http://sunukekubuwaraj.22web.org/captain_planet_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/eC4LPje/79172420968.pdfIn PDF document text
    • https://dotomogef.weebly.com/uploads/1/3/4/7/134760479/738181.pdfIn PDF document text
    • http://sexugaweguko.iblogger.org/gozejufuxutitonedulu.pdfIn PDF document text
    • https://zupudawuliwubil.weebly.com/uploads/1/3/4/2/134265939/fageligajujebet.pdfIn PDF document text
    • https://cdn.sqhk.co/tevunufoba/OgcISPb/pifusizuwerofewun.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/jghDjgj/blueprint_basketball_tournament.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/robert_jordan_lord_of_chaos_audiobook.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/21726578997.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/cmhc_rental_market_report_2018_halifax.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_off0000e038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE038 5308 bytes
SHA-256: 253f4fede03a3342e0143e9eb7a861f8907a984919262a5270f47cb7e68f6b3b
font_01_sfnt_off0000f26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26B 21344 bytes
SHA-256: f16a45e9a1d5a479fb071f126ef1cca5a97c2625f6c18edccd7dc508b7cb6708

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