Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a31cc4252c90e2…

MALICIOUS

PDF

67.8 KB Created: 2020-12-24 03:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 88af5d51f019e16aea65b7d2d0ece09d SHA-1: bde09803a1789093605a9395890731ad880f3e49 SHA-256: 64a31cc4252c90e2e27df8663e57bec0bd3c3fdccc212194d18b735327777532
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The ML classifier and ClamAV also flagged this file as malicious, indicating a phishing or trojan-like intent. Although no scripts were directly extracted, the presence of embedded links suggests an attempt to redirect the user to a malicious site, potentially for further exploitation or credential harvesting.

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://gettraff.ru/123?utm_term=120mm+x+240mm+in+inches In PDF document text
    • https://firupewuvub.weebly.com/uploads/1/3/4/3/134330425/344920.pdfIn PDF document text
    • https://wogijelagorezu.weebly.com/uploads/1/3/4/0/134096035/b312d4b79450cc9.pdfIn PDF document text
    • https://totorososine.weebly.com/uploads/1/3/4/8/134892144/dovililivatuvan.pdfIn PDF document text
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/c62ab695cfd.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/bijobewowubi-vasopipi-tulugiwosivad-xejux.pdfIn PDF document text
    • https://ninobajoxakatud.weebly.com/uploads/1/3/4/7/134702009/a0a4202329.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/sifawekujiki/58179884217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3ec048-e1c3-43c4-ba60-b6369c8967f4/56197027855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5dda97-2fef-41b3-8eb0-a9f7019c10f9/genome_mate_pro_facebook.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/deer_antler_mount_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/grindr_premium_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cfba845-a112-4bf1-82c1-0728a4e70e4c/jusosik.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/murujofatonekad.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/33527434923.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/xolupekatowuwutirijol.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_off0000cc4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC4B 5088 bytes
SHA-256: 000a725113e8d7e64f2632c71e0b93dce88778aa6e8d9335c7efe3f2ed509ae9
font_01_sfnt_off0000dd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD87 10820 bytes
SHA-256: e783f851db7faebc09604b3ede7ebe332979d4b4a3853ab619e4b57e85e3811e

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