Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf66ac5d1f1e629a…

MALICIOUS

PDF

75.3 KB Created: 2020-11-30 13:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c45171071682d5118fd607f3f4ea44da SHA-1: ffd0527adec1534da6de74a922b6d18ffe52103a SHA-256: bf66ac5d1f1e629a91d54b6919aced9be3d1daabc94db796de75b40c77f79fa0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to 'trafffi.ru', suggests a phishing or link-farming attack. ClamAV also detected it as Pdf.Phishing.Trojan. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

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
  • 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://trafffi.ru/aws?utm_term=free+sheet+music++panis+angelicus PDF link annotation
    • https://gakuzelidojipo.weebly.com/uploads/1/3/4/3/134395763/toziteg.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/2084745.pdfIn PDF document text
    • https://m��������.com/��������������������/33131263/������������������/5783438,������������:{������������:0,��������:0,count_to_visible:3,��������������������In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xotomisen/apricot_seeds_dangerous_mayo_clinic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23c4a3e4-4811-44e1-8d78-390d8da127cb/25938182274.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/83634677675.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5816f81c9a2a0c993201/1606375448658/demepomojozisin.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc15bd3ff13940aa242d827/t/5fc2fdcdcb3e0f5771b30a49/1606614478423/67986482760.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/zewax.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/map_of_world_grasslands.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/42830078857.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffcc36609fd0ee78c2f31/t/5fc450303485235c864fce5d/1606701105488/angle_of_attack_indicator_cessna_172.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b4e4c89e1c4b8fbd626a/t/5fc453a33c6ccf69f3e8ee9c/1606701991337/the_pathfinder_nicholas_lore.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_off0000c44c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC44C 5300 bytes
SHA-256: 8844d1dfb4e5e1c92bd1eaba85cfff4e3bc321243c575730953253a6a53a8ff6
font_01_sfnt_off0000d62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 16240 bytes
SHA-256: b1ddf3accab88bff4863e97fff42fcf968f6beefd63dda5e820660830f865657
font_02_sfnt_off0001089d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089D 16268 bytes
SHA-256: cc519744a865dac00d2088f95648dc7697116d800148f0f2a7bb116295abfaf1

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