Malicious PDF — malware analysis report

Static analysis result for SHA-256 34bc8a3ae4ade403…

MALICIOUS

PDF

86.6 KB Created: 2021-05-16 02:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 12989df72acd88face0ea841e3b576fb SHA-1: 292f0e9cd4f753a66362e079458f40cb6e929a41 SHA-256: 34bc8a3ae4ade403b85a5dac925fe5c12c99309d19d476be709089b47545ca60
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to manipulate search results or redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=how+to+pair+cochlear+mini+mic PDF link annotation
    • http://lodomujimujug.mywebcommunity.org/fresno_city_college_campus_map.pdfIn PDF document text
    • http://instapodarok.site/nodawexsa4mf.pdfIn PDF document text
    • http://ygrash.website/civic_education_book_grade_10pd0kl.pdfIn PDF document text
    • http://fetesitomer.mygamesonline.org/pazosowow.pdfIn PDF document text
    • http://nesobaka9.xyz/rdr2_companion_glitch9c154.pdfIn PDF document text
    • http://draiwenstore.online/tv_ears_5.0_dual_digital_reviewslbfss.pdfIn PDF document text
    • https://nagejezesalu.weebly.com/uploads/1/3/0/8/130874580/8f0095a0643b187.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/gizelotuvevopusazesujudes.pdfIn PDF document text
    • http://grusha.space/balak_palak_full_movie_300mb3qejg.pdfIn PDF document text
    • https://kozedisibep.weebly.com/uploads/1/3/4/8/134898116/59200.pdfIn PDF document text
    • https://rodusebit.weebly.com/uploads/1/3/0/8/130874039/wowivefopevav.pdfIn PDF document text
    • https://bewulikafujisew.weebly.com/uploads/1/3/5/3/135326730/bd6284f4202.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://8b5ac0f3-2bc4-49a6-9a99-2541af31b215.filesusr.com/ugd/f2ef67_4c66022327d14a56a8bb954fb75135bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dupula/krewella_alive_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/autocad_studenti_ita_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/alfred_piano_book_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/dajjal_history_in_islam_in_urdu.pdfIn PDF document text
    • https://2df275fc-a8dd-466e-be95-33fe0afe7bed.filesusr.com/ugd/9b6d1e_e11dbc55ef3c418da2e73c421e9c7193.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vovuzize/busegiwatumafoximanowe.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/angular_2_admin_template_material_design.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/statistical_techniques_in_business_and_economics_18th.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/kinirowudafividi.pdfIn PDF document text
    • https://8f1ef4f7-3f23-41ef-a3d6-4e5873a175a2.filesusr.com/ugd/d318ce_16fbb1f11c5e4887ba38ead9f8b4d5af.pdf?index=trueIn 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_off000107c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C3 4836 bytes
SHA-256: baaa2864a2b972d020675299979473707b4fdb05152757a156a55d7dff98dba9
font_01_sfnt_off00011803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11803 10988 bytes
SHA-256: ad5cfda069f4e08ed0a4e8dfc3a46a24188e3b426c2b87771fddd752a9cc6adb
font_02_sfnt_off00013d62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D62 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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