Malicious PDF — malware analysis report

Static analysis result for SHA-256 1deb1e8c5289f4d1…

MALICIOUS

PDF

75.1 KB Created: 2021-03-19 16:57:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 9e206bde4c002d06fced94388745e5ba SHA-1: 439291105f6aee17ed0b7fd9ff9117fe512b82f1 SHA-256: 1deb1e8c5289f4d1602267cc9f37a434cee23eed0e2d95d56721fd30fa42bd39
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to disposable domains and Weebly-hosted files, indicating a link farm or SEO manipulation scheme. ClamAV and ML classifiers strongly indicate maliciousness, with the primary URL suggesting a lure related to 'Ford certified pre owned warranty'. The sample's purpose appears to be directing users to this network of links, potentially for distributing further malware or for malicious SEO.

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://vilenefex.ru/award?keyword=ford+certified+pre+owned+warranty+pdf PDF link annotation
    • https://kagidawizukafep.weebly.com/uploads/1/3/5/3/135346662/voxof.pdfIn PDF document text
    • http://wuxetij.mypressonline.com/61529206500.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/60564311056.pdfIn PDF document text
    • https://fulodovujigiw.weebly.com/uploads/1/3/4/0/134016909/lixona_jemiwufen_pazaju_rurol.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/primary_mathematics_2b_workbook.pdfIn PDF document text
    • http://apparently-home.com/29044127638yem2p.pdfIn PDF document text
    • http://55571.ru/vaxubipixixifeguvafimupovuhmls.pdfIn PDF document text
    • https://dusivasawomila.weebly.com/uploads/1/3/4/6/134660852/8a6a2.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/tracfone_lg_journey_lte_phone.pdfIn PDF document text
    • https://nadagedo.weebly.com/uploads/1/3/1/8/131858166/4978715.pdfIn PDF document text
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/22d75c7f.pdfIn PDF document text
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/7b400de5e.pdfIn PDF document text
    • http://megalit-korolev.ru/67246663231z89df.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/43490809995wloo8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/jerry_garcia_band_after_midnight_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/39617642094.pdfIn PDF document text
    • http://rigidafavubo.myartsonline.com/80767329059.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/xawadi.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_off0000e599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE599 5088 bytes
SHA-256: 6547f2687913956be54d939eff5e529f00cd4182985f44d8ddc26e710351504e
font_01_sfnt_off0000f717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF717 11252 bytes
SHA-256: f7aba51cdc9af2e882af85c41f62c41e08712650cf64b4a94cc6dd198c4982d5

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