Malicious PDF — malware analysis report

Static analysis result for SHA-256 e04a78ff00d2a97d…

MALICIOUS

PDF

92.4 KB Created: 2021-04-01 03:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 52007eda995c4f9af64326e618ff5907 SHA-1: 88105b07e921c5ccc65f3235b63a2f14bfab1f59 SHA-256: e04a78ff00d2a97df733ef0d900d7378ddb081ae9af6f813703ba1b8b73c0f49
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 0.9996

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://xezojetit.ru/aws?utm_term=what+is+the+purpose+of+nmap PDF link annotation
    • http://dimax-matrasy.ru/33417809385q9sw2.pdfIn PDF document text
    • http://smotrikino.fun/134348335768u48s.pdfIn PDF document text
    • http://detonic-romania.website/dua_e_manzil_free_downloadh8qtu.pdfIn PDF document text
    • http://winsbig.space/fantasy_wargaming_the_highest_level_of_allqhfiv.pdfIn PDF document text
    • http://smartcreditscore.info/what_do_umbrella_symbolize_in_a_dream7m9ke.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/numunenoji/dungeons_and_dragons_board_game_rules.pdfIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_cb766d142db945d690d0b5ff81e0db21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/dalozudonapusevi.pdfIn PDF document text
    • https://a6047d18-b57f-4fdc-88fa-dea7715a8642.filesusr.com/ugd/189347_b3702989144543419863a1f91926724b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xopugup/45466717026.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7db6fb1-59d1-4d9e-b9a6-94eaa8c4e11c/zulebuxe.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/human_anatomy_atlas_2018_free_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc58c34d-fa96-4dea-82b3-e6854a5ceccf/chefschoice_4643_prontopro_diamond_hone_manual_knife_sharpener.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/consumer_reports_used_car_buying_guide_magazine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950e4042-38ba-4dfd-a080-e7e4519c76e8/toxezisekitopek.pdfIn PDF document text
    • https://ddb281da-11d2-423e-b83a-408ecf1f607f.filesusr.com/ugd/9db61c_0a741626726f4ad7af95e6c38bb89127.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/dunelm_bed_sheet_sets.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/64025749101.pdfIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_56a14e2329634def9122d5c3602da830.pdf?index=trueIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_741b6914c27a458abb6d93861d6f1bdb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b1447d-ae80-4a52-8fba-f7b7062395c2/95877446549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f162955a-1c06-411b-b892-959aed4df5c4/dewogekonitedu.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_off00012a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A76 5120 bytes
SHA-256: 47dc670e4cc7d2679e4a15fda0792216a7fa0a3f553f22940542008aa16f319f
font_01_sfnt_off00013bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC4 12112 bytes
SHA-256: 97c29fa33d32199511a0fffd32e0da0b86f14ee9b981f0ed064f7fef8fd6c6e4

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