Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9f60e32d9f1d33…

MALICIOUS

PDF

86.4 KB Created: 2020-12-23 05:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2fd403867cb3a9478476f33077299283 SHA-1: 21796840916ca1e5456d69999afef347ddd1bed5 SHA-256: fc9f60e32d9f1d331f324da3e980baa64778b5cae8e3f1c9178e9feeee34817a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or redirect users to potentially harmful content. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection indicate a phishing or malicious redirection scheme.

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://traffmen.ru/strik?utm_term=the+edge+of+dawn%2528+seasons+of+warfare+buttercup In PDF document text
    • https://novadoja.weebly.com/uploads/1/3/4/8/134873208/5039578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385026/normal_5fa96c8125689.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490720/normal_5fe025e96b2b5.pdfIn PDF document text
    • https://samomalekadoj.weebly.com/uploads/1/3/1/4/131438786/592a9ee0c4e6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380228/normal_5fccb8f1747df.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417216/normal_5fc9474643389.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5fceaf24018c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463808/normal_5fcf50a146a68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477401/normal_5fdeef7ed8c20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462993/normal_5fcdfa4426985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450038/normal_5fbc12c1e2860.pdfIn PDF document text
    • https://rugabefek.weebly.com/uploads/1/3/0/7/130775918/danegozujaluluv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425727/normal_5faff5732ed45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_5faf6de61bb46.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/7328254.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc115278ef7301f8b11bee7/t/5fced74f69d6d06d552fade3/1607391057363/fofoziziwavof.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_off0000cd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7C 22384 bytes
SHA-256: 9ba7764d78c2c1e5223d24399c0292bcef9f1baf256b3b51303e7a5209ec7fc2
font_01_sfnt_off0001147c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147C 5644 bytes
SHA-256: 5ef85e15ff52b5be691fc8537c4df19350ea93e8f6043af6720b2af2a5032b0d
font_02_sfnt_off000127c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C7 10108 bytes
SHA-256: d4acc55e59623f60cb6e737fad8bdc83d963af126e10f04bf1597daf5d2b1eb5

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