Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3c5556ab4b91ed…

MALICIOUS

PDF

77.1 KB Created: 2021-03-29 15:15:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a70e72d4f0f3f4735957f186d86bfae1 SHA-1: 48fa7d7da426151c4c2d98fee0da612b5a3baeb0 SHA-256: ab3c5556ab4b91ed8feeddd9a09e9797b0ed590f8442578be9b391f99e481931
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 0.9992

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://jacksth.ru/award?keyword=proyecto+de+energia+hidraulica+pdf PDF link annotation
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/lafodolodudajolob.pdfIn PDF document text
    • https://pukegivox.weebly.com/uploads/1/3/1/8/131856392/kopixofulifebe.pdfIn PDF document text
    • http://chambrely.xyz/tebokilidasugoti7o2tc.pdfIn PDF document text
    • http://load-bcp.com/572202424916bk35.pdfIn PDF document text
    • https://loxugajasogilo.weebly.com/uploads/1/3/4/4/134476701/3d4b8870aec6ab.pdfIn PDF document text
    • https://lotitarep.weebly.com/uploads/1/3/1/3/131383228/loxafegak-tunajabirabuv-wazamowojumi.pdfIn PDF document text
    • http://parkingtest.xyz/dajugevebozunuf8rd1.pdfIn PDF document text
    • https://zusikoxapumobib.weebly.com/uploads/1/3/4/7/134766975/tivudawuwimoxaw_joliwuxuviwi_bewagaposapoto.pdfIn PDF document text
    • http://tryadasert.online/vaxejifisc2rw.pdfIn PDF document text
    • http://loveworld.club/anari_movie_full_hd_video_songsmnj8y.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/jazamerijekufol/pujafopodipafabe.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/best_ebook_reader_for_reading.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/52463327587.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/16207018844.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/81710415118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1282d4-22d7-4270-9f6d-cd00d37aff36/xemomeforoxogowaxal.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/timothy_zahn_thrawn_books_in_order.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e9b68f-0317-4112-b8db-040f67ad1bc9/long_610_tractor_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/nunaw.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/filmora_free_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/what_is_the_9_box_model.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/how_stock_market_works_game.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/dr_bruce_lipton_biology_of_belief.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC14 5344 bytes
SHA-256: d619c307951c6d87be5a0ca971ec37ffd031d1477191dc43af03afa8740e06ee
font_01_sfnt_off0000fe46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE46 11780 bytes
SHA-256: fd5e84b8f2ab33df1fbfeeb8b9b3ce07ef2227c956c7bb6d2332092999696016

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