Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98a1ff8f6c58ae8…

MALICIOUS

PDF

81.0 KB Created: 2021-05-13 11:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: da1d5bad7699f19bb7e044dd62045516 SHA-1: 091be9e797e57e0f7acb3aef1c2e824e2900c793 SHA-256: a98a1ff8f6c58ae8d381f4373fe3ee3abf2469e0f7221f6312ecafc4b745ad25
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://ponafet.ru/strik?utm_term=cyberpunk+red+tabletop+review PDF link annotation
    • https://pawagidi.weebly.com/uploads/1/3/1/1/131164052/ed6751f2d73c.pdfIn PDF document text
    • http://qwonder.space/vintage_spider_man_comics_for_sales7lp0.pdfIn PDF document text
    • https://dubamuxurel.weebly.com/uploads/1/3/4/4/134463085/941ed6065f3988.pdfIn PDF document text
    • https://bawusazatodopam.weebly.com/uploads/1/3/1/3/131378774/linazonaruk.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/31a3d4eeab0950.pdfIn PDF document text
    • http://deemonatrafik.xyz/how_many_christian_martyrs_in_20th_century5msdm.pdfIn PDF document text
    • http://tehnotop.store/303083015360fufk.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/gewisetug/east_india_company_game_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/52327270083.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_bd844822a566486aba6c9f83d763639e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d5621e6-6ca5-4646-b928-75c23aca1854/can_baby_sleep_overnight_in_uppababy_bassinet.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/how_to_repair_kenmore_water_softener.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_4a1572a40f6a4334b40589d0ccec6e4f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1888198-42a1-428e-9a6c-b377773b9e8d/24780076815.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_600d1d71288049e6ab792211f1175acc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/widiku/how_to_sync_rca_remote_to_roku_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b529ce2f-4b20-4bbd-b517-a4ed726fedb7/70303305364.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/se_vuol_ballare_pronunciation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0a235f1-82c4-4cbd-8bcf-fcc1134bd031/somovasabisa.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/promissory_note_agreement_template.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_off0000ff29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF29 5136 bytes
SHA-256: 8e9cde19f5e1300efd94ec300b4b401f5f0f1e0f995e80c71fca46f9c88ab263
font_01_sfnt_off000110c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C3 11040 bytes
SHA-256: 6c98869030a6cd1e38989a313cceebb02206d1ab3c3471e6b8dcb8ebed3c4fae

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