Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba77a967a04d680…

MALICIOUS

PDF

81.4 KB Created: 2021-03-23 05:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 11111716ff6dee67cbb9a55a99068b09 SHA-1: 4b2f8fdbfafdc01f8aa64d05c86a47927f8529e6 SHA-256: 5ba77a967a04d6802292052727df79b5571d5e45f4e33db5b8a1ee5781d938b0
166 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a link farm designed to host malicious content, specifically pointing to a PDF payload. The document body, though heavily obfuscated, suggests a lure related to 'flowchart diagram template microsoft word'. The presence of external URIs and the ML classifier's high confidence score further support a malicious classification. No scripts were extracted, but the overall structure and linked URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://resalured.ru/strik?utm_term=flowchart+diagram+template+microsoft+word PDF link annotation
    • http://maturibcgj.space/zizonupififurafisadaginudlaeri.pdfIn PDF document text
    • http://pukitifafizeba.mywebcommunity.org/princeton_review_sat_chemistry_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuduwedimu/jSiizij/41732187252.pdfIn PDF document text
    • http://sogixusi.medianewsonline.com/brahmanic_tradition.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/que_siente_un_bebe_cuando_se_tiene_relaciones.pdfIn PDF document text
    • http://sosed.market/akulaku_apk_for_laptop3ncd2.pdfIn PDF document text
    • http://fagogit.sportsontheweb.net/nawunurov.pdfIn PDF document text
    • http://silujokiz.mypressonline.com/10_class_biology_text_book.pdfIn PDF document text
    • http://itdiscounts.info/lajavufotivox6c30.pdfIn PDF document text
    • https://cdn.sqhk.co/sefedetorup/ianuif1/65635198214.pdfIn PDF document text
    • http://energytik.net/how_many_carbs_in_taco_bell_soft_tacokvy35.pdfIn PDF document text
    • http://lebojabufi.medianewsonline.com/yamaha_timberwolf_250_4x4_review.pdfIn PDF document text
    • http://vuroxinizona.scienceontheweb.net/oncology_nurse_practitioner_job_description.pdfIn PDF document text
    • http://investmag.org/mark_bible_quiz_questions_and_answers_in_tamiles2w6.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/autocad_2020_tutorial_book.pdfIn PDF document text
    • http://sale50.pro/tuxasofuk59m9n.pdfIn PDF document text
    • https://cdn.sqhk.co/sitopizol/hdiiicx/goroverejegaro.pdfIn PDF document text
    • http://magazinrf.xyz/cavernous_angioma_malformation_radiologyx24en.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tenezozujilajiw.rf.gd/68094688146.pdfIn PDF document text
    • http://gegilifopom.myartsonline.com/58283068718.pdfIn PDF document text
    • http://wujitotulofok.rf.gd/63444419206.pdfIn PDF document text
    • http://jowimonaperu.epizy.com/53703366328.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_off000101aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AA 5616 bytes
SHA-256: 4f7d82dd0d88a93933a2df271cfaa45ddc14b6b89484e0e700fcf500db39ef58
font_01_sfnt_off000114ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AE 10308 bytes
SHA-256: 17007296ab732ff843d34f1771dca4819182a274335fc32401147b5943a9f06a

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