Malicious PDF — malware analysis report

Static analysis result for SHA-256 5925199390b5e427…

MALICIOUS

PDF

83.3 KB Created: 2020-11-12 22:23:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77aa7ecb695e9efd841065fbf2664dd1 SHA-1: 92a5684f3b073dd4788021b10c4ffea19d63ed5d SHA-256: 5925199390b5e427352248b5c66813593f8af0ff74bb67adb34033f296eb7331
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, with one heuristic specifically identifying a 'PDF link farm'. The document body, though heavily obfuscated, suggests a lure related to 'Gametogenesis definition'. The presence of numerous external links, some pointing to Weebly and other hosting services, indicates a potential for hosting malicious content or redirecting users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?utm_term=gametogenesis+definicion+pdf
    • https://xitonodulamet.weebly.com/uploads/1/3/4/3/134307836/revefafojezonamur.pdf
    • https://cdn-cms.f-static.net/uploads/4391302/normal_5f9149305b3a3.pdf
    • https://cdn-cms.f-static.net/uploads/4403807/normal_5f94cdda158f2.pdf
    • https://cdn-cms.f-static.net/uploads/4384307/normal_5f9125249db2e.pdf
    • https://nometiru.weebly.com/uploads/1/3/4/3/134379396/kaguvigi.pdf
    • https://cdn-cms.f-static.net/uploads/4372384/normal_5f8ffff4c4d3c.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jumedemimo/choomantar_song_hd_video.pdf
    • https://uploads.strikinglycdn.com/files/cf0ef7e6-fc5a-43ae-a9fe-c4cee8698e6b/76441816787.pdf
    • https://s3.amazonaws.com/rorives/sasukitonesa.pdf
    • https://uploads.strikinglycdn.com/files/294f15fb-b238-4fcc-8a82-cff53b851962/66261821975.pdf
    • https://uploads.strikinglycdn.com/files/bfad24a4-ad4e-4af0-99fe-5790944d8afa/dovikunokimogejoxibew.pdf
    • https://s3.amazonaws.com/gizonukorad/moog_tie_rod_ends_by_size.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000decf.bin
a2d50108fa830a57c1afc8669ecf09aada15f0717fd6d338314fc89ca6b8d06f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDECF 1960 bytes
font_01_sfnt_off0000e82d.bin
e6e1851c5b866848e2eb057bd11def3b9a0ae767c57739997a5c996b859d1962		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE82D 5168 bytes
font_02_sfnt_off0000f9ba.bin
bad04b2788a3b9480349b3897ba3258d27f215a515e94523ce94fc57a58cf682		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BA 10032 bytes
font_03_sfnt_off00011c4e.bin
5df9a924020f3b47f20d23ec22d8572383feb6ad42681b2b1a3175c3053cc5e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C4E 16132 bytes
font_04_sfnt_off00013144.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13144 4324 bytes

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