Malicious PDF — malware analysis report

Static analysis result for SHA-256 45dd2decce9179be…

MALICIOUS

PDF

77.4 KB Created: 2021-06-08 20:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92dd2f7cb3f70325d19547fc676c29d0 SHA-1: 514950ddeee5ea18fbd94d4e88f3aacb70cd4132 SHA-256: 45dd2decce9179be2befd5e0cff8c3cf390703924903c81a6dd099039287000c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/pbw?utm_term=dr+driving+bus+indonesia+mod+apk
    • https://soxokelu.weebly.com/uploads/1/3/4/4/134494323/sulowigiwetolo_zemake_pibusegoma_xologusorasem.pdf
    • https://zolopopi.weebly.com/uploads/1/3/3/9/133999976/loleruwum.pdf
    • https://nuzaguwimera.weebly.com/uploads/1/3/4/4/134492670/1176f7f0359a78.pdf
    • https://static.s123-cdn-static.com/uploads/4401694/normal_5fefed6519110.pdf
    • https://static.s123-cdn-static.com/uploads/4473622/normal_5ff3d41d4eda0.pdf
    • https://vevatujiv.weebly.com/uploads/1/3/1/4/131482893/fizudedar.pdf
    • https://cdn-cms.f-static.net/uploads/4376127/normal_601d212824f72.pdf
    • https://cdn-cms.f-static.net/uploads/4393022/normal_5fd7937699159.pdf
    • https://nelubetif.weebly.com/uploads/1/3/5/3/135322580/xanumifusuro.pdf
    • https://sugiravo.weebly.com/uploads/1/3/4/4/134455537/tuwokurege-rudanarix-wupemozuwirag-xagesiguk.pdf
    • https://xisaluzesa.weebly.com/uploads/1/3/4/6/134602292/e2d353a1.pdf
    • https://fotawadibegul.weebly.com/uploads/1/3/1/1/131163643/b401e362ea5e4be.pdf
    • https://padobijitoxu.weebly.com/uploads/1/3/1/0/131070591/3640440.pdf
    • https://mowazaxof.weebly.com/uploads/1/3/4/7/134704653/kilunelovuvijut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/4b58fe17-1143-4fa7-aed7-2cabd4c0858a/vawepisifojimubutofino.pdf
    • https://uploads.strikinglycdn.com/files/5fba9e6c-da3a-4cf3-9b66-1f40bf0555b1/45020458930.pdf
    • https://uploads.strikinglycdn.com/files/57be46ab-55d3-4c05-b559-5c451781f86e/why_did_white_fang_kill_sasoris_parents.pdf
    • https://uploads.strikinglycdn.com/files/bdef733c-0e79-468b-8270-5ef2797a95b4/sony_mdr-zx770bn_battery_life.pdf
    • https://uploads.strikinglycdn.com/files/725c74ca-e287-4aea-ba3e-4d5b33b71a74/analogy_worksheets_for_4th_grade.pdf
    • https://uploads.strikinglycdn.com/files/6803b98a-f31b-4ded-9f71-eaad82cb68bc/gipemijonagaxo.pdf
    • https://uploads.strikinglycdn.com/files/779ee8f5-85b0-45c6-9c3c-f9be682e7863/35194865826.pdf
    • https://uploads.strikinglycdn.com/files/49d88db7-e0e9-4a7f-a126-fc1bbe99dd85/fukamipinumewivaxiri.pdf
    • https://uploads.strikinglycdn.com/files/282fa0fb-58d8-42af-bff4-8d7dbd0f9df7/how_to_clean_a_vintage_art_print.pdf
    • https://uploads.strikinglycdn.com/files/f015450e-b44c-467c-8e79-46420e4d9381/ghosts_by_raina_telgemeier_read_online.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3b9.bin
cb874e51ca49acd186b69403593f318a61b76cc39e5c438f7c7c19abd9988a75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B9 5312 bytes
font_01_sfnt_off0000f5ae.bin
f14bb6cb58bf3f47544de0f55ccd3eb2e89f3af274ec98b77d3729f74713ad41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AE 10704 bytes
font_02_sfnt_off00011986.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11986 4324 bytes

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