Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80e8f161fe4caf2…

MALICIOUS

PDF

81.1 KB Created: 2021-03-16 04:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c28c43f2072a1205056d5ac0271018c8 SHA-1: 4e7ec92e5547f451bae530298bc207106606a0aa SHA-256: b80e8f161fe4caf2b549f72ebdd9f169204db6351b7abeba78ead6a34f4c74f5
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URLs, with one prominent URL leading to a domain that appears to be part of a link farm designed to redirect users. The document body, though partially corrupted, suggests a lure related to search results, likely to trick users into visiting the malicious site.

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 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://xezojetit.ru/strik?utm_term=what+is+meant+by+the+word+social+structure PDF link annotation
    • http://pojesuwemi.iblogger.org/hp_battery_not_charging_windows_10_fix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_6047b0954e204.pdfIn PDF document text
    • https://mavujaxubuxabo.weebly.com/uploads/1/3/0/7/130775304/0d4528cd72dd9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489428/normal_60318cafd7977.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/memivalakaxudemuilkc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_601e331510a1f.pdfIn PDF document text
    • http://pet-guru.shop/xbox_flight_simulator_2020_release_datejnfpp.pdfIn PDF document text
    • https://mogewojelepa.weebly.com/uploads/1/3/4/6/134681452/rizesimuj_weveludavude_juwazabuselu_suzutu.pdfIn PDF document text
    • http://bowenaf.22web.org/boolean_algebra_nptel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446942/normal_6044263aa5902.pdfIn PDF document text
    • https://kapefamutom.weebly.com/uploads/1/3/4/8/134849172/nisidokudijax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_603454f41eade.pdfIn PDF document text
    • https://rejoxaratexudo.weebly.com/uploads/1/3/1/4/131453252/5336416.pdfIn PDF document text
    • https://tadizusojad.weebly.com/uploads/1/3/2/7/132712436/2451277.pdfIn PDF document text
    • http://kazedoruredupe.22web.org/euphemism_practice_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/92fd8283-cf87-441f-b43d-953d1762efcd/toro_recycler_20334_self_propelled_mower.pdfIn PDF document text
    • http://jupilabezisetif.epizy.com/90683671181.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6774f6f9-2438-4178-a439-c02d7dbabdcd/what_does_burning_barn_mean_in_dreams.pdfIn PDF document text
    • http://zogaxemajov.epizy.com/how_to_wear_navy_blue_shirt.pdfIn PDF document text
    • http://velefejaforafe.rf.gd/tawibobun.pdfIn PDF document text
    • http://webidiwotew.epizy.com/dokobopaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6c5fdc-fe8f-45d4-a2a4-10d66ce3d54e/what_is_the_greek_epiphany.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_off0000ffa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA8 5524 bytes
SHA-256: ee1383792b58f1599927b7d944faa76947913d3b27bf2cde9e5a30335ae665a7
font_01_sfnt_off0001125c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1125C 10932 bytes
SHA-256: 924a2446ae17551c57568f2c5f6693c19e25d19a04888688b87cd28253c3f1b2

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