Malicious PDF — malware analysis report

Static analysis result for SHA-256 0649d5d684a731e8…

MALICIOUS

PDF

68.7 KB Created: 2020-11-11 21:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 53598aaf01fb754ca2f9e6293048dca3 SHA-1: d2f9fa46fa5c1e55daa2f32bdbbd7ea8a4ab22b2 SHA-256: 0649d5d684a731e8e4526da389354b42c323475ada607aaff89736fdd6145fef
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a "donor response card template". The presence of numerous links to external PDFs and a critical heuristic firing for a malicious redirector indicate a phishing or redirection attempt to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ggtraff.ru/aws?utm_term=donor+response+card+template In PDF document text
    • https://megeleju.weebly.com/uploads/1/3/4/3/134319984/ca6ea1012079a5.pdfIn PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/gawoxixagixeb.pdfIn PDF document text
    • https://boripate.weebly.com/uploads/1/3/4/5/134590871/modidenapob.pdfIn PDF document text
    • https://zopopalolidipe.weebly.com/uploads/1/3/4/5/134500843/8490791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_5f8e77f95ce43.pdfIn PDF document text
    • https://pivamaxisogen.weebly.com/uploads/1/3/4/4/134481881/dunim.pdfIn PDF document text
    • https://lixesexe.weebly.com/uploads/1/3/4/6/134600642/4d0dd3bc97f.pdfIn PDF document text
    • https://tobuzedatenet.weebly.com/uploads/1/3/4/3/134322281/wafunuzenakeverag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421354/normal_5fa5946c32c92.pdfIn PDF document text
    • https://tikedamo.weebly.com/uploads/1/3/1/4/131453682/604b9ae1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/simujix/xowemavu.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/lmt_defender_2000_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/litafikadige.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/call_of_bieber_2_unblocked_4_life.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E4 4956 bytes
SHA-256: 519cf9dd833c2f32b2bd3f91dc570c8638d6107e9290a9a60347e43e2456ddfa
font_01_sfnt_off0000d49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49F 10380 bytes
SHA-256: f6eaacc2e437f0d8f8972cfa612cf47097cd3fb4a37cc2d82a5b4260b114c5df
font_02_sfnt_off0000f834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF834 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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