Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d02f71431bed919…

MALICIOUS

PDF

68.8 KB Created: 2020-12-21 03:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 436e77445276cd74a89dd11faa96c834 SHA-1: 7a519e0ec41129777a28995a46746fabb92f71c7 SHA-256: 0d02f71431bed919222c26c651a92861611a181dff313c7123623f093c933541
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link to 'traffking.ru' and a PDF link farm. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of numerous embedded URLs and the critical heuristic firings suggest the document is designed to lure users to malicious sites, likely for phishing or to download further malware. The file's structure and embedded links align with common techniques for distributing malicious content via PDF attachments.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=law+and+order+svu+intro+words In PDF document text
    • https://numeroluxovuz.weebly.com/uploads/1/3/4/7/134733954/funar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446170/normal_5fa3675999a1e.pdfIn PDF document text
    • https://xubupibef.weebly.com/uploads/1/3/4/7/134742940/b17fc9b68fe301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_5fa579ddc3d1b.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/c0cd7b45fc7cd.pdfIn PDF document text
    • https://juvobekini.weebly.com/uploads/1/3/4/3/134384538/9180bab1d3.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/7241578.pdfIn PDF document text
    • https://manukigobedor.weebly.com/uploads/1/3/4/4/134481395/wajejez_dowomipejomadu_wejesiguviv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xurixado/nice_guidelines_hiv_treatment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a2c6d1-bb2f-4f68-bf1f-5123c32fb599/araby_james_joyce_tone.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/90021039685.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11c6dc6229360ecae3742/t/5fc4ef9d3c02f22b9da78046/1606741918499/94395177059.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/suwupuzixijokedoda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfdbf19d00c472c28c2758/t/5fdffe352baf317dc3ba4bd7/1608515125665/bollywood_movies_app_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/73865614427.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_off0000d218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD218 4880 bytes
SHA-256: fbdc885ea7a9d141c39c09db25fda11caa192f014d2d34c7eacc2b6b3cbec868
font_01_sfnt_off0000e2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DA 10344 bytes
SHA-256: 2b6f7445f9d39de55e2c237043b5ddb0375ac6d9f9bbf7eeb21adc2aec742775

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