Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f2126062e12cf59…

MALICIOUS

PDF

76.7 KB Created: 2020-11-27 18:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ae137aa71cfab0d9194235b0b10627b3 SHA-1: d86067eb241dd35858e5cc52ab37fcab4c8c9a26 SHA-256: 9f2126062e12cf59a5efe681542b5f662f860163f29274790c0ac12686aa1aa4
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and known malicious redirectors. The heuristic firings indicate this PDF is designed as a link farm, likely to distribute phishing content or malware. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/strik?utm_term=cub+scout+salute+pledge+of+allegiance In PDF document text
    • https://baluwona.weebly.com/uploads/1/3/4/6/134611665/fukuvajesetevabip.pdfIn PDF document text
    • https://rurirenaw.weebly.com/uploads/1/3/4/6/134652156/fuxigusipar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_5fbf10a0c4fc8.pdfIn PDF document text
    • https://titawijuneve.weebly.com/uploads/1/3/4/0/134012454/5785140.pdfIn PDF document text
    • https://sikiroradimer.weebly.com/uploads/1/3/4/6/134619363/butajalorola-kisutagum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387713/normal_5f92786ab49cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_5fbc1f3197432.pdfIn PDF document text
    • https://vakigosem.weebly.com/uploads/1/3/4/4/134480352/343e074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_5fb4e3b1399f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448539/normal_5fa41847c20fa.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/notodokal_xipomasikofu_domegu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/goviwigax/38465368097.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/mesozikojudutukin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29a02703-4f0c-4b66-ab7a-625e9ef5b76d/14783348945.pdfIn PDF document text
    • https://s3.amazonaws.com/vopadofugon/manitowoc_inmate_list.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA12 5272 bytes
SHA-256: 28e234f31ee225c115909426bb74df6ec84a41acd63744769615ed4b70c4385c
font_01_sfnt_off0000ec09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC09 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000f496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF496 10220 bytes
SHA-256: 8aec1c236016d661fbdbcd2346b251a2613e7370394619a55245188fe349c545
font_03_sfnt_off0001175b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2