Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d26614b76edc394…

MALICIOUS

PDF

74.7 KB Created: 2021-03-05 05:32:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5ce9d3869a8068c9c1a91001c6300f34 SHA-1: fcd0c3fca2bb2df05f3566c58ccf76f15a68bccc SHA-256: 4d26614b76edc3947bab4ef169e996c678cdaf5718055a3ae7185e00fa28b3c4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or malware distribution attempt.

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 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://xajibur.ru/wix?keyword=nervous+system+diagram+worksheet+answers PDF link annotation
    • http://masito.space/92049650303snuvd.pdfIn PDF document text
    • http://cosmicgig.com/xikewapinijejidanezilenul3ew1v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490128/normal_60415a5e43902.pdfIn PDF document text
    • http://form-lnstagramcopyrightservices.com/51635925168c3b4i.pdfIn PDF document text
    • http://tricitysikhs.com/65440243440pcbso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426541/normal_6004ff9d9c045.pdfIn PDF document text
    • http://lomuwugevona.getenjoyment.net/genesis_1_26-28_esv.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/mawanivemekiwezujomodo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375195/normal_5fce8e28e9f8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473403/normal_6015ac5e59abe.pdfIn PDF document text
    • http://efarbok.xyz/star_trek_ships_classes2d7n6.pdfIn PDF document text
    • http://outputqwvk.space/422211767619l7ji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417122/normal_5fcf66c82a245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445114/normal_600b0eba63754.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jirabasojexosud.atwebpages.com/why_does_my_upper_back_hurt_when_i_look_up.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/56213704659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4603badb-cdf9-4217-8ae9-1cf74cc332ae/hypnerotomachia_poliphili_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee14595-d7d5-4397-9d40-974fc27c6be2/xokexuvoboliwubanemoseb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab4a6858-5af4-401f-9229-8ac7e5bfa985/the_power_of_love_lyrics_hillsong.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_off0000e90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90F 5492 bytes
SHA-256: b706d4d88fd249ed68f1a2fe49698e303ec6a3f516b544e3786e6b9614d90559
font_01_sfnt_off0000fbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB0 9940 bytes
SHA-256: cd0cee19094c59d827218bca2a823c85362d33ac08ff2d083066ddbc657a8313

Open this report in the interactive analyzer, or submit your own file for analysis.