Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e79c7ed12c79fd1…

MALICIOUS

PDF

87.2 KB Created: 2021-01-11 15:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5f714dcf968d9d4583f63942015dbfac SHA-1: 2eb883ddfc6879592e614ad550123abd84c28a71 SHA-256: 1e79c7ed12c79fd1f15f7622f9a046b4862a894af9c818e09eaeb2470ecb96e7
214 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, indicating it is a phishing or trojan delivery mechanism. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm designed to obscure the ultimate malicious destination. One critical heuristic specifically flags a link to a known malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/123?utm_term=palladium+fantasy+rpg+pdf+download In PDF document text
    • https://jodalutuz.weebly.com/uploads/1/3/4/4/134444421/muwitijujagop.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/vakameguzurom.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofodatop/ngilijV/find_my_friend_android_app.pdfIn PDF document text
    • https://dejurepezuneron.weebly.com/uploads/1/3/1/4/131452785/wirinosinij-goxedijidiwixas.pdfIn PDF document text
    • https://butabefuje.weebly.com/uploads/1/3/1/4/131437434/9660296.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403561/normal_5fe5976fa725c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446400/normal_5fa5309ca622c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423471/normal_5ff5b62eeae70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5fb77b019e5c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465539/normal_5fc79af26fcbb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454988/normal_5fdd2faa78928.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/mesixadelomomo/29421234830.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_off0001144f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1144F 5556 bytes
SHA-256: d4b1c729a3b0367754a0b8c2639c9350a2470cdb34cf9d68565e3a12d15e391e
font_01_sfnt_off0001273b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273B 11772 bytes
SHA-256: 4853543b116b6981df7a58c6d53ab5cb3207afc691e6f8792fc0ceff77335bc7

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