Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cb751e35d8d01a…

MALICIOUS

PDF

73.1 KB Created: 2021-03-24 23:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 08cd5ebc0acab4b23e18022a30cafb1a SHA-1: 599afab8182e171eb211c9ed91bc5328b6de5e73 SHA-256: 04cb751e35d8d01af5b280a51c688fe11baf9bc4466d5ab0c2070f9335b7bf1e
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 0.9997

Heuristics 6

  • 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 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://botokaw.ru/award?keyword=dr.+berg+s+new+body+type+guide+pdf+free+download PDF link annotation
    • http://koolmaxt.online/14871936275k6p07.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/waripetuposip.pdfIn PDF document text
    • https://riguzegadediva.weebly.com/uploads/1/3/5/3/135314075/cce362.pdfIn PDF document text
    • https://jebopisozezir.weebly.com/uploads/1/3/0/7/130739828/xeredif-duvotevazulot-zenenixodoj-wadozepodu.pdfIn PDF document text
    • https://jafovoguna.weebly.com/uploads/1/3/4/0/134096268/2202482.pdfIn PDF document text
    • http://zowomojagobipur.iblogger.org/wordly_wise_book_7_lesson_9.pdfIn PDF document text
    • http://startbastar.online/stickman_soccer_2014_download_apkrcby1.pdfIn PDF document text
    • http://copyrighytsupport.com/76919073502txifv.pdfIn PDF document text
    • http://stebsmeh.space/koliguvogkusa.pdfIn PDF document text
    • http://pe50off.info/30617044896p0aq0.pdfIn PDF document text
    • http://appletopshop.ru/jozivis9a1.pdfIn PDF document text
    • https://tewedarutomos.weebly.com/uploads/1/3/2/3/132302993/pojoz_vavemobelip_posomowawuki_fuxir.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/df94002c-2c74-424b-8a9f-3217051490e7/kepez.pdfIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_1328e8a4712a4f8ebf49945e40ae2578.pdf?index=trueIn PDF document text
    • https://e824aeac-d22a-4b45-bb3c-17051d6ee04f.filesusr.com/ugd/de60da_ff33eb3b8569417caf717ff329fdf412.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e724d65-cce9-42d3-94b4-a47c3f7c15ea/1997_suzuki_sidekick_off_road.pdfIn PDF document text
    • https://e9b66cc5-9289-431c-8f17-6739e1cd2d88.filesusr.com/ugd/c8f33b_0be5d5aa59414e809c42933f06d46e6a.pdf?index=trueIn PDF document text
    • http://merapuw.epizy.com/sosugawuf.pdfIn PDF document text
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_2180be999d234272952d6791962ab187.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d01ce5f-d3ca-4575-bae3-8d24ac1c8288/71398560133.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_off0000dafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAFA 5576 bytes
SHA-256: 0d233669c01db6baef0ca8ebbc44a57f4f3438ad2d3f1d70916ae4c0ce7bb113
font_01_sfnt_off0000ee21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE21 11264 bytes
SHA-256: 34728b5ee0e6945b873779424d94137cd5926e27a79c64090136a3c71050a711

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