Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3449f7fd36ffd6…

MALICIOUS

PDF

74.5 KB Created: 2021-03-10 15:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 95b23f0b3e247b0c69b1918f3a35ed6a SHA-1: f9badb99e4b0027bf963f4b3de8930953a779dcc SHA-256: cf3449f7fd36ffd6f5b799f7efb09946ca431cfcc93e46f58e4a3fb667008fa9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to this behavior. While no scripts were explicitly extracted, the PDF format can embed JavaScript, and the presence of external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://fokemale.ru/wix?keyword=subaru+impreza+workshop+manual PDF link annotation
    • https://migixemigesafo.weebly.com/uploads/1/3/1/3/131381985/zakafizugeta.pdfIn PDF document text
    • https://dawudetunik.weebly.com/uploads/1/3/5/9/135972975/boniwuzibegejukalol.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/text_file_to_html.pdfIn PDF document text
    • https://zitejapaj.weebly.com/uploads/1/3/1/8/131872087/5474202.pdfIn PDF document text
    • https://noxitituruvid.weebly.com/uploads/1/3/4/9/134904787/jifomixopa.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/mini_bike_repair_shop_near_me.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/the_salt_fix_how_much_salt.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/like_water_for_chocolate_summary_chapter_9.pdfIn PDF document text
    • http://xevedudox.sportsontheweb.net/ravigijilapadofivagupu.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/jejulurowev/51829590293.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/4270057667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebc4c02b-d7b0-41fa-85e5-bca47ec8d17e/carrier_debonair_220_installation_manual.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/ponerajitujisibijate.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/this_modern_love_how_i_met_your_mother.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b166e6-d20b-4f3b-a7c4-c88b60345429/vvx_410_polycom.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/zanidubibo.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/annual_business_development_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/how_to_learn_scratch_computer_programming.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0232f40-fff4-44b1-b1a2-5234779d2b1d/swing_trading_for_dummies_amazon.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_off0000e73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73B 5508 bytes
SHA-256: 12feb68512626c2cc2d329418e94d8165ce40ea823eddfefeeb8b8506b06ba33
font_01_sfnt_off0000f9e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E2 10264 bytes
SHA-256: 0b0ba8eae3b75a102733a4965479b35fedaaed4a33325791e7bcb998777e6f3a

Open this report in the interactive analyzer, or submit your own file for analysis.