Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1833db62aa8d508…

MALICIOUS

PDF

75.0 KB Created: 2021-03-21 03:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 843378c32dd95a40b2f6d62345a8c98d SHA-1: 5366f1bb36a9513854428c94d60159e8a618043a SHA-256: a1833db62aa8d50831eff35c297870f6dd8d087bda32a6ad7ab3a852a480b946
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('xezojetit.ru') that is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'Norton anthology volume d pdf'. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/wix?keyword=norton+anthology+volume+d+pdf PDF link annotation
    • https://cdn.sqhk.co/lerapuraroke/jgjf0wm/change_caller_id_to_private_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/4xiiihb/majazudiros.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/how_fast_does_a_cup_of_tea_cool6k2c4.pdfIn PDF document text
    • https://cdn.sqhk.co/bomunerafoju/iibI2Qz/the_cw_live_channel.pdfIn PDF document text
    • http://miiliioner.xyz/denojefarotewokotobevi84yqe.pdfIn PDF document text
    • http://potozafit.medianewsonline.com/denver_broncos_2020_schedule.pdfIn PDF document text
    • http://keysecret.ru/gamoxipigenokudob6drd.pdfIn PDF document text
    • http://servicesforsupport.com/would_a_cortisone_shot_help_tennis_elbowfj3xj.pdfIn PDF document text
    • http://ita-fitness.fun/99687122292s74w0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b606863b-7098-47ae-8a88-a7302b540410/botejetixuxabikexibimudal.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/denon_avr-1912_7.1_review.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_8cd2d1fc69d74f7aa64c9347d5c435bc.pdf?index=trueIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_33177a2fea1c4435ba62a30e3d287741.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6ea475-4f90-4278-88ac-79c0344916df/easy_world_history_quiz_questions.pdfIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_0b781ef920d24fc090bc256a40cfcb43.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/putelekireza/technic_launcher_cracked_direct.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839f3b2f-4cc8-407f-9fb8-7e058a3c6db8/wuwukozutunos.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/retal.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/juzenowura.pdfIn PDF document text
    • http://xirexadugimog.atwebpages.com/99848644204.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab59c877-cb86-428a-a820-8e74f3742d8c/vekebojegebige.pdfIn PDF document text
    • https://be8414c4-f2d5-40c6-b8a8-1a5561a1dac7.filesusr.com/ugd/a452ea_918ca3fe94ec487187ba50fa63f72724.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/571278af-dad7-4893-aec5-e15c187eb95d/betazofowosabe.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_off0000e6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AA 5408 bytes
SHA-256: 0b9254eef3f2bea9bee47e545deffc34b2f14e7ad2812320a66525db8fe23c5d
font_01_sfnt_off0000f8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FF 11144 bytes
SHA-256: 278c2b454bfac19888f7fa89d138dbcb98516fa5688c11262463e55568a897bd