Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f715b2d5c3d2c93…

MALICIOUS

PDF

66.4 KB Created: 2021-03-25 05:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6ed1a75da81446d104ea97d401f6af70 SHA-1: b3772c045c5fb8bf0201a19d4403d8892ea2b71a SHA-256: 0f715b2d5c3d2c93e52e5b7df8b8e5399911bf8ade3be0d0e90fb39fc144946e
186 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 0.9998

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
  • 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.
  • 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://bologen.ru/strik?utm_term=dell+s2340m+review PDF link annotation
    • http://judupebe.getenjoyment.net/58982526928.pdfIn PDF document text
    • http://dosijaruwiteli.mywebcommunity.org/rozigaweb.pdfIn PDF document text
    • https://sozatoma.weebly.com/uploads/1/3/4/4/134484551/d0f44dcadf6c.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/jimef.pdfIn PDF document text
    • http://bafiselavanebep.mywebcommunity.org/avant_garde_and_kitsch.pdfIn PDF document text
    • http://pekibimige.mygamesonline.org/59157283541.pdfIn PDF document text
    • http://sodepaxeka.iblogger.org/98462821.pdfIn PDF document text
    • https://pifixisoti.weebly.com/uploads/1/3/4/3/134379985/netejix.pdfIn PDF document text
    • https://vubujoxesawuzar.weebly.com/uploads/1/3/4/4/134476738/8666046.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafukip.myartsonline.com/how_to_fix_a_disabled_iphone_without_itunes_or_computer.pdfIn PDF document text
    • http://juludix.epizy.com/ximusitipomewolukuroku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea7ae413-3ed9-4d27-ae36-f6be879dc053/volume_of_rectangular_prisms_worksheets_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/274d720e-d2d9-425b-bdd6-08b3da9b6230/tl-wr841nd_openwrt_repeater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70333c99-6df7-4927-af1f-cf0f9609a515/2006_dodge_charger_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b37b21-6b5d-4de8-808c-5eeefa9dd109/what_are_the_goals_of_healthcare.pdfIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_781157193ada4457822434dccc254a79.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b62e6f-946c-42db-96ba-b6dac56e2317/jarabezutejuvo.pdfIn PDF document text
    • https://21319658-e817-4d6a-846f-872ccfe0f0c2.filesusr.com/ugd/982af2_d539e47a75084cec9ea1f65f1bf41dd7.pdf?index=trueIn PDF document text
    • http://ribafaga.rf.gd/qsc_touchmix_16_factory_reset.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_off0000c6ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6EC 5300 bytes
SHA-256: b82623b5d1bd1407303ba181bbaab2c904b031a1ad640a419091a7229cf5ef21
font_01_sfnt_off0000d8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FF 10604 bytes
SHA-256: b0864cc1056ad0048e9fd5c5ee6fbff0fe03577736e77a71b4d10aad262a1b6a

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