Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8f6d6a9fb4dccf…

MALICIOUS

PDF

76.2 KB Created: 2021-04-29 01:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 34c60942843a71d97b2bcdd309a9b8c1 SHA-1: d45f72fdb73f4f0879ed861cab5f12e133662d05 SHA-256: fb8f6d6a9fb4dccf8ed9f88cc4b5efb183390532afdd5f3f7c08cdf16abdcc33
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-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://xajibur.ru/strik?utm_term=why+is+my+frigidaire+ice+maker+not+making+ice PDF link annotation
    • https://nopubogap.weebly.com/uploads/1/3/4/6/134667077/882bb90a20d.pdfIn PDF document text
    • https://gejosubirimo.weebly.com/uploads/1/3/0/7/130776575/6527429.pdfIn PDF document text
    • https://dujizajep.weebly.com/uploads/1/3/4/7/134704211/8f60ed0fc8c642e.pdfIn PDF document text
    • http://pixujuxe.mypressonline.com/lose_weight_eating_apples_and_peanut_butter.pdfIn PDF document text
    • https://bajurajatug.weebly.com/uploads/1/3/6/0/136054821/tidosi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_808b8d6d9cf54ee1a2f0d9095ea650f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/639c2b5b-cbed-4d26-b49a-a959b529f92d/who_is_the_beast_in_lord_of_flies.pdfIn PDF document text
    • http://kepinud.rf.gd/durivoraduri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd2056ca-731b-463a-80a5-ce94c91f4aae/rovaxusibimixizapoxok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a5923be-cfae-4d1e-b500-db93e16f4005/wufubokixeludanadiwap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afda4590-d4c1-4a3b-895b-ffb26b02a112/fobafafajegomeguvizafop.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_6ed2b687482f451795094ea76317f3f4.pdf?index=trueIn PDF document text
    • http://dikawuferiwa.rf.gd/salaja.pdfIn PDF document text
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_a381bb11bac2484d80cdfa4039b987c6.pdf?index=trueIn PDF document text
    • http://fefisapuvekebi.epizy.com/data_warehouse_tutorial.pdfIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_4e58311562e34ebabf25db49dcfa6ab0.pdf?index=trueIn PDF document text
    • https://18bc7be3-897e-46c1-a475-efc190d089bd.filesusr.com/ugd/62845f_08d37ea13d924cadb549a9ec496f0a11.pdf?index=trueIn PDF document text
    • http://bejanifezilo.atwebpages.com/d_d_3._5_character_sheet_fillable.pdfIn PDF document text
    • http://zusewijoje.epizy.com/josowuriwoluguvesage.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_off0000eb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB74 5580 bytes
SHA-256: 90d47af113bffaf39c03e15477ec07b008354a70a621675ebb694bc9efcbc4a4
font_01_sfnt_off0000fe58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE58 11216 bytes
SHA-256: 39076821fbe43d28a2b549886ca4b10ff85715006064787201bd6fd3e9faa389

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