Malicious PDF — malware analysis report

Static analysis result for SHA-256 42fece0e5bca2b74…

MALICIOUS

PDF

77.3 KB Created: 2021-03-13 23:45:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3fecd2b43dbf636a9f645fc96553cd27 SHA-1: 55bb2bd940130896acdfae2284ff04a0e3531e1b SHA-256: 42fece0e5bca2b74fefbd16af901b309931527dbef699a6a74601c532af18a3a
166 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. It uses a password-protected-archive lure. 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 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/strik?utm_term=rt-n66u+reset+to+factory+defaults PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413109/normal_602c3a12b4a34.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/fiiKST8/wonasubajizexomukogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377924/normal_602acf2a53ea1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416656/normal_5fc66d1e834e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377380/normal_600a5269529ba.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/gchfAkN/44600543141.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_68a48df0b6ed4a5bac973d194a7c5e45.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/824dac9e-69e9-4efd-9985-9502aa2cb7af/sikuredijokis.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/pexixed.pdfIn PDF document text
    • http://kirotomi.epizy.com/gawojosijojomitariv.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/gevumo.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/how_to_own_the_world_book.pdfIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_50217cc442ac4b9f871f7555a9858233.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/how_to_find_expiration_date_on_safety_1st_car_seat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f6f1f8-2efc-4409-bfe1-4ebf6ddf40d0/the_trials_of_apollo_book_set.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/dubopoxedavibuvomabepizo.pdfIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_62fc2da6ed0e4521ac5ba0d10ba34a73.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e7b77bb-910a-4fbb-b5c2-02a46fb474b3/89922935313.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98eace0-3f08-49e7-929f-cdccdffea393/come_follow_me_lds_videos.pdfIn PDF document text
    • http://sasozazanixe.epizy.com/42975649309.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_off0000f0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 5312 bytes
SHA-256: 0a57d85b00b2d8965975553e445dccfe0d58b6585c141d48294a41610d7df338
font_01_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 10776 bytes
SHA-256: 350b1149eab64f432bbdbf3ff93d55ef358784143cda67fcef3bcbd229ed7507

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