Malicious PDF — malware analysis report

Static analysis result for SHA-256 8598368b5bb9a495…

MALICIOUS

PDF

91.4 KB Created: 2021-05-27 07:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 66c04a87338a653ac544a5dc48510548 SHA-1: ca9a5a8381af1674e1034164039f99e2170c938b SHA-256: 8598368b5bb9a4955fdb983771c1af11b49ee557e5a93a33c264e151a6e93780
164 Risk Score

Malware Insights

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

The PDF file contains multiple external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://maypoin.ru/strik?utm_term=how+to+top+up+new+contactless+cashcard', is directly linked to the document's content and likely serves as the primary lure. The presence of a ML classifier flagging it as malicious and ClamAV detection further supports its malicious nature. Although no scripts were extracted, the structure and embedded links suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/strik?utm_term=how+to+top+up+new+contactless+cashcard PDF link annotation
    • https://tuvukorop.weebly.com/uploads/1/3/1/8/131857527/dogobuvozofetiwaxil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366045/normal_6006417762c0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_604bb8800aa5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488336/normal_6068c25cdfe97.pdfIn PDF document text
    • https://jopegivev.weebly.com/uploads/1/3/4/2/134234712/pipeg-gogifag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_600de908d2010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450141/normal_5fda309b3e2de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480743/normal_5fe7afead459d.pdfIn PDF document text
    • https://riwitasaroxaga.weebly.com/uploads/1/3/4/6/134656256/53213e6762f2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377925/normal_5fdf004c5a298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_602e0687e1501.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446030/normal_6041808d4d839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475859/normal_6005db4bdda99.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://uploads.strikinglycdn.com/files/456c9939-ab8f-4d56-9c8c-b6735bd6b00a/how_to_give_yourself_a_love_tarot_reading.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02f3b1cc-25ce-4580-9721-b2e2b39ae348/kingsman_the_golden_circle_full_movie_download_in_hindi_480p_bluray.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55f9a52a-0ed3-4063-8782-7e2e66464c65/balivumepezor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24f724f-664c-469b-83b4-ae1b931bd7a1/lg_g_pad_7.0_lte_hard_reset.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 14612 bytes
SHA-256: 1d3198a5331b04d09b0e75b205235bf8fb274717f7a06219f28271af8e5c5c00
font_01_sfnt_off00011804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11804 5048 bytes
SHA-256: 9d06aa1160d8e49a0920655532724199c76da4d4c1837174159e44aa8cecf793
font_02_sfnt_off0001292e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292E 12000 bytes
SHA-256: c6dbfbae08c2d4de9a9bb96f6348e17bffa013b875ad8a9de49f633763373792
font_03_sfnt_off000151b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151B5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.