Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2abf367de3b5f5b…

MALICIOUS

PDF

69.5 KB Created: 2020-12-21 07:59:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d204f27c09fd774cadd4ddca98295fb1 SHA-1: 58be2b47ac659275165bdc5c99109484a7e4b1c5 SHA-256: b2abf367de3b5f5b25c0f8f2cae114f78dc8386b64faf773b829d4e181480d89
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of embedded links, many pointing to disposable hosting services and one redirecting to a known malicious infrastructure. The document body is heavily obfuscated and appears to be a lure for search engine optimization, likely to drive traffic to malicious sites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/strik?utm_term=strawberry+pound+cake+recipe+with+jello In PDF document text
    • https://majemuxisirilud.weebly.com/uploads/1/3/4/7/134719568/6077335.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/a5a60cfe9ed818.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/wibopivi.pdfIn PDF document text
    • https://vasabofilusav.weebly.com/uploads/1/3/4/5/134585229/gufuxivizowoku.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/sozaz-silimefemop.pdfIn PDF document text
    • https://vakexojukesazi.weebly.com/uploads/1/3/0/9/130969985/9bf7ed7.pdfIn PDF document text
    • https://damemerivojed.weebly.com/uploads/1/3/4/3/134378109/9103790.pdfIn PDF document text
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/pugarefajobodid_mulamefedul_femapixe.pdfIn PDF document text
    • https://duveniwapawas.weebly.com/uploads/1/3/4/2/134265961/905ec2c.pdfIn PDF document text
    • https://solujokorox.weebly.com/uploads/1/3/4/1/134108712/9797a1ba7abb2.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/23904521-e3f6-49da-ac73-50e8b35d0ef6/zobekugakinojisunek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3660ba0-fb71-43b4-a168-be590d3e905e/mons_palace_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abbbccd3-a228-4174-a390-938de312f661/pepoxik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d114bda-3339-4ff2-a15f-f88638ed208c/jatadenew.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF78 5560 bytes
SHA-256: 05fdd075dfb1bce05cd6943f52daf71ce58bb83f216cd41df79185ae5a631de6
font_01_sfnt_off0000e273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE273 11844 bytes
SHA-256: 161ddc07af2102d0a642deb0486e4acd512ec01a1b54b04985b48eb1b16092c0

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