Malicious PDF — malware analysis report

Static analysis result for SHA-256 970395678082c023…

MALICIOUS

PDF

74.3 KB Created: 2021-03-03 10:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ed0b032166748fad0a72621a9e390f4a SHA-1: ed5f82cf1c0fb3576da1816dad75c18f0907038b SHA-256: 970395678082c023f7c8e39dec17245c00a066775dde60802b1ea301109f687c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, with one prominent URL leading to a site that claims to offer geometry test answers. This is a common lure for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely involving the distribution of a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://lozipotod.ru/wix?keyword=chapter+2+practice+test+geometry+answers PDF link annotation
    • https://cdn.sqhk.co/boguzivipel/ecV179I/lightsaber_for_sale_ireland.pdfIn PDF document text
    • https://cdn.sqhk.co/febenapox/2FjeghS/55853141621.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/50875661062.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/mumiwitinato.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501775/normal_601ad9405fdfd.pdfIn PDF document text
    • https://ditoleruv.weebly.com/uploads/1/3/5/3/135345680/rumololisejob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487208/normal_5ffd798307371.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485689/normal_5fccdfe030fcc.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/8694204.pdfIn PDF document text
    • http://counterman.ru/how_to_remove_the_foregrip_from_an_ar_15laftq.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/jcejbjg/shooter_movie_quotes.pdfIn PDF document text
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/tudupuxoxewokenad.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/6gdigvH/commercial_air_hockey_paddles.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/luxaduzimase/sushi_nutritional_information_california_roll.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/joxukesudakisitimera.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/fotoviro.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/autocad_2014_student_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/soxobigapejidu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD2 5548 bytes
SHA-256: bb9f94ef1045d684a6dd832c4f86bffe3cd6573ac37b9ea9caeafe74b93070b2
font_01_sfnt_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 10352 bytes
SHA-256: a8671bf94d24cd474c093f06eb45215940e56182b082937c4a64976164584310
font_02_sfnt_off0001064a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064A 16240 bytes
SHA-256: 400ab18ff8ca6c51049040440e2ff03b59a0ae0b68178a649edac32363174010

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