Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2b68bfd52461378…

MALICIOUS

PDF

75.6 KB Created: 2021-03-12 08:12:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 7edb934418e3d7db6d2f2b3173dc4210 SHA-1: 9a0ae278efd77c51913b14c66ca245777f3f7775 SHA-256: c2b68bfd524613781bf3817d16a024c512970f7ff8dbd7d0f3692b777137f386
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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://nipisod.ru/strik?utm_term=honda+hrx217vka+for+sale+canada PDF link annotation
    • https://cdn.sqhk.co/munuluxel/geidoij/ninja_craft_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/fisoxinizo/Wr5ia3k/83486556498.pdfIn PDF document text
    • http://fortuneo.biz/ladoty6p6w.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/jepjf0q/butidizumefune.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/p7rif5k/pigimuguduwuvalataguresub.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/hb486jf/10574895737.pdfIn PDF document text
    • https://cdn.sqhk.co/fajaleniwa/jbhjHij/tadadegabolukisozit.pdfIn PDF document text
    • https://cdn.sqhk.co/bunewonu/jaGidgd/34043809336.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/dyjj1WP/alien_invasion_books_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/bojowagawire/giMhdtg/wood_block_puzzle_answers.pdfIn PDF document text
    • http://epaytds.xyz/5629186355emxvm.pdfIn PDF document text
    • https://cdn.sqhk.co/kapimetavis/NeGibgc/79915123625.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/vufupu/81400964202.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_179c2edd2cda403fb01f278df02d6be6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab45ea5-2bf2-459d-b6a2-6a53b23c3efd/41082286471.pdfIn PDF document text
    • https://s3.amazonaws.com/tubupejevomo/sadaw.pdfIn PDF document text
    • https://a001dc82-f31e-4944-9b76-0a8e602b6855.filesusr.com/ugd/e4ee87_fd235998a87f4551a8fc6b4f2fb54ca0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/048a8276-8f14-40fe-b722-1c23e0034545/romuxefebe.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/heat_of_neutralization_experiment_28_lab_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65edc7b-1168-4d2b-b332-e8d9c1303c60/vanerepifaguz.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_5bad0aa5d227432fad618afbeeff97e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/rapimesolabonago.pdfIn PDF document text
    • https://97783159-ced7-426e-9fbd-60d2bb3342fb.filesusr.com/ugd/00058f_f050d4bc6c5c4de4adbc2d92078bdbd7.pdf?index=trueIn PDF document text
    • https://3e1d1bad-f645-4ebd-ac75-469e7ff7c972.filesusr.com/ugd/e745be_132edab0d8ba4622a81a9b55f096e289.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3d25b49-e0d8-488b-af0f-018b20797aca/does_scarlett_2i2_work_with_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/bourdieu_forms_of_capital.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_off0000e849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE849 5528 bytes
SHA-256: e43bb4411f6ac51fdd63e59d10691d736b9dc5f2dc4da446cd812cc55998678e
font_01_sfnt_off0000fb1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1F 10940 bytes
SHA-256: 6df5e54305282053e95a80567f1183158b7f9ed0a5520bc8bbd047936a545599