Malicious PDF — malware analysis report

Static analysis result for SHA-256 80fec35c774c0aa1…

MALICIOUS

PDF

120.9 KB Created: 2020-12-29 12:22:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e512dee631daec42a8f6ad2914e5d13d SHA-1: 9819fc3e68ae33e4187657af016ec3cff45356b0 SHA-256: 80fec35c774c0aa1bd18360cc9153373e36b5ee3e8f548c73e6a9d491c413034
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. One of the primary external URIs points to 'https://traffine.ru/strik?utm_term=auto+swipe+tinder+code', suggesting a phishing or traffic-generation lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://traffine.ru/strik?utm_term=auto+swipe+tinder+code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407780/normal_5f99b15fef810.pdfIn PDF document text
    • https://wuwuleli.weebly.com/uploads/1/3/1/3/131398564/3ca61bd.pdfIn PDF document text
    • https://didizotaxudip.weebly.com/uploads/1/3/4/6/134619455/ea3db.pdfIn PDF document text
    • https://gojemafofapuvog.weebly.com/uploads/1/3/2/6/132681271/fesaregekob.pdfIn PDF document text
    • https://zurowesijeja.weebly.com/uploads/1/3/4/6/134630916/xutepemurowijalizupo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/74bae86e-de9b-496c-8858-0889f19950fe/comptia_security__get_certified_get_ahead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3da9ba-431e-491c-9960-48e6ab642586/ethiopian_cargo_flight_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbb68c61-00e5-467f-ad8f-77c77d73f52f/58578112806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84ce4da3-5f70-4882-a3a5-29c8d2a45e62/bibevarapezewizik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b14074-afab-4771-b972-940a445c3d7a/5835627624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d7ada1-c16a-43e1-acff-5fa13da3b9e6/ffxi_smithing_guide_ctownwoody.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c04f4c96-1d2e-493b-bf54-7e58ac107f6e/zitasalebusam.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001a09d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A09D 28904 bytes
SHA-256: 99ec29066c4ea768b7d1a3bf1ef64f4ab072173cea1d8befc5366baf67a780ff
font_00_sfnt_off000142fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FE 6812 bytes
SHA-256: ca24bdafb8bbb869cbf463ec553f7ebe8fac9d92b2ff95474d77e3f511273adc
font_01_sfnt_off00015432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15432 4908 bytes
SHA-256: 664f808bbfd5ab25050419f063b7240b23b209349505e18bbcdc2b0c63ae9a0b
font_02_sfnt_off00016500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16500 4552 bytes
SHA-256: b659ee7cf7f3a842ee3f3349c2480719c96515fce04c89efab400f19bd79316b
font_03_sfnt_off0001766d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1766D 12580 bytes
SHA-256: 2e35494799686f07c8d62adc443bc04ca2a581c79d032acd26345152b59f095b

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