Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2119503758ca302…

MALICIOUS

PDF

80.0 KB Created: 2021-03-13 16:48:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ef88b6497bc1f5e34a1bd592ea6c55f6 SHA-1: d9468152e5dddc95a7886bcc0399b039afde4d51 SHA-256: c2119503758ca302bca8f37fce822288fe6f6c5afdacffbd9916c350e65ed750
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary URL suggesting a lure related to Bollywood music. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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.
  • 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://leonvi.ru/123?utm_term=top+bollywood+songs++320kbps PDF link annotation
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/lovelamamiwugo.pdfIn PDF document text
    • https://wojanoxunoliwam.weebly.com/uploads/1/3/5/3/135394081/kovepezivolupagef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453908/normal_6004be7859ba5.pdfIn PDF document text
    • https://tobevasisutigi.weebly.com/uploads/1/3/0/8/130814636/mukepefip.pdfIn PDF document text
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/fotopixunuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417643/normal_602fa8dc82fd8.pdfIn PDF document text
    • http://zezarujewida.iblogger.org/cannabidiol_parkinson.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449968/normal_5fd24ff532ac2.pdfIn PDF document text
    • https://faneputivodi.weebly.com/uploads/1/3/0/8/130874667/f654a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473618/normal_5fec8d36d79f1.pdfIn PDF document text
    • https://wimetuzozafod.weebly.com/uploads/1/3/4/6/134604259/fba2abab5c.pdfIn PDF document text
    • http://rexifiru.iblogger.org/77173187216.pdfIn PDF document text
    • https://newadagunezadev.weebly.com/uploads/1/3/4/6/134684801/gupebawufure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418175/normal_5fd8b731851d0.pdfIn PDF document text
    • https://jaradaka.weebly.com/uploads/1/3/0/8/130813635/setufolodumu.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
    • http://kevatudoritek.rf.gd/tamil_nadu_express_platform_in_delhi.pdfIn PDF document text
    • http://poresiz.epizy.com/kudubo.pdfIn PDF document text
    • https://s3.amazonaws.com/lezerawe/yardsticks_book_4_year_old.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/guidestar_equivalent_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/pre_algebra_summer_math_packet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/89009509138.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/45252588200.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/45880614232.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_off0000ed2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2C 5148 bytes
SHA-256: bfc7414c0ea6b41c38bc48591c378a918713b5425c803d5dfc9a1e7d7b055a40
font_01_sfnt_off0000fec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC2 11076 bytes
SHA-256: 68d2ca2ffd6099d7f3a94c9b554f4f5bd2ec98d08fc1aea44e834e23ef88ffc8
font_02_sfnt_off00012452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12452 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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