Malicious PDF — malware analysis report

Static analysis result for SHA-256 9916a22e97bc6ec8…

MALICIOUS

PDF

83.0 KB Created: 2021-03-30 20:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fe91ba805f226bc0539c837f61bf619e SHA-1: c257e6744f7a20dcca12331e72361d5995da32be SHA-256: 9916a22e97bc6ec8120106d51cf401ede66082f8e9c31b71d4f587079ea58069
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to search terms, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/wix?keyword=craigslist+in+orlando+furniture PDF link annotation
    • https://cdn.sqhk.co/pidenali/gfgeiJx/rabewanibalad.pdfIn PDF document text
    • http://thrivewebs.com/30213534712m69na.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/c9giRRQ/folafuladerefulaxisu.pdfIn PDF document text
    • http://chatik85939775.fun/xewafexexizolizipkl8q.pdfIn PDF document text
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/6527674.pdfIn PDF document text
    • https://cdn.sqhk.co/farategibod/mP4HG8h/zukowizanizonebul.pdfIn PDF document text
    • http://vibetajifiwote.iblogger.org/sociology_optional_question_paper_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/cihjc9h/kisefaror.pdfIn PDF document text
    • https://cdn.sqhk.co/xalesikozip/v5geZgc/4457198187.pdfIn PDF document text
    • http://bepedegikojafeb.22web.org/printable_calendars_2020.pdfIn PDF document text
    • http://discovljzg.fun/how_much_does_trex_decking_weight_per_square_foott9sl6.pdfIn PDF document text
    • https://cdn.sqhk.co/loganidob/agheBAM/costco_paradise_color_changing_led_rope_lights.pdfIn PDF document text
    • https://saxeguwub.weebly.com/uploads/1/3/1/4/131406831/surax.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/GLPjhif/34056490314.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/Bifjbgj/hunt_the_man_down_movie_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxujagemo/dSiiQrm/24308482270.pdfIn PDF document text
    • https://neredijavapud.weebly.com/uploads/1/3/1/4/131409024/jikavudewajim.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://s3.amazonaws.com/defipedibe/newspaper_template_ks2_a3.pdfIn PDF document text
    • http://mujigakevomo.epizy.com/99_kannada_movie_in_tamilrockers.pdfIn PDF document text
    • http://lilufunom.epizy.com/arab_spring_books.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/technical_skills_and_functional_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/cats_the_musical_script.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/xoturasifanefiniso.pdfIn PDF document text
    • http://fawepajemug.rf.gd/31793752985.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF635 4980 bytes
SHA-256: ce065978e76fc69256d319bedf877a68780fd6f1355bb9c7a012a11ff2cbba06
font_01_sfnt_off0001072d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072D 12064 bytes
SHA-256: 75429b71000545ead1ba195e11271d658751c4ba54d098c3020cb40530df8f62
font_02_sfnt_off00013042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13042 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71