Malicious PDF — malware analysis report

Static analysis result for SHA-256 acad9508f716b64f…

MALICIOUS

PDF

70.2 KB Created: 2020-12-21 07:16:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: edb81d928e7e41f117eaf06e820962af SHA-1: d21fe959e473fe682a7c1920da5fdd9696d6c7c7 SHA-256: acad9508f716b64f5d7ac1a485359a70872b22904f1f07d256352e16d373821a
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a phishing or SEO poisoning campaign. Although no scripts were explicitly extracted, the presence of numerous links and the ClamAV detection point towards malicious intent, likely to redirect users to phishing sites or download further malware.

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
  • 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.
  • 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/123?utm_term=blue+mage+guide+ffv In PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/1844859.pdfIn PDF document text
    • https://buvebozu.weebly.com/uploads/1/3/1/4/131453495/7522443.pdfIn PDF document text
    • https://disadoxamegipu.weebly.com/uploads/1/3/4/5/134527150/661874.pdfIn PDF document text
    • https://serofijukepaba.weebly.com/uploads/1/3/4/6/134693026/zepetixuti_taxetilo.pdfIn PDF document text
    • https://nulixosur.weebly.com/uploads/1/3/4/3/134311840/xirurixeli_xisofukomi.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/4f559c7251ac.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/takurugilij/dirufegenurirodir.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/9945251448.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2830cc30a162e0c5caa26/t/5fcc9d4f5d2e6f3bda37bfa6/1607245135863/tuwivemifanesanenebog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc367fa116eb00e3c5be3f0/t/5fd136d5e09a1e6e1d95706a/1607546582008/gravity_coin_pusher_machine.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcb81cb919dd0c3e451148/t/5fdcfd418f65117591020258/1608318273335/agust_d_songs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce7a3f71026b035386f77c/t/5fd0223e5efba8153b197828/1607475776242/among_us_character_maker.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d1048139af037651a389/t/5fc4afc41972c46e3c31bcbe/1606725572842/fakovawemulevokaleguku.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_off0000d7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DC 5060 bytes
SHA-256: fdce7f1f9a78444bd37a30485f683680b78987ef50617c5b4c03c06b144e5ff8
font_01_sfnt_off0000e913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE913 10288 bytes
SHA-256: 0280cdccaba28c4cfeff1a4fffb0d829f3594f822649459861f0668d02f2bf1c

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