Malicious PDF — malware analysis report

Static analysis result for SHA-256 160e7b48d548b78f…

MALICIOUS

PDF

88.9 KB Created: 2021-03-22 20:36:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 88e1312f8cdd01a21ef17203d04e1259 SHA-1: fddfc778ed7dfea9994be6879d58da5c1030c160 SHA-256: 160e7b48d548b78f8ffa571a0b02111ee24138ace91c6181a1bb963260112ae2
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs point to infrastructure commonly used for phishing and malware distribution. The ML classifier also strongly indicated maliciousness, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://dafemum.ru/wix?keyword=what+is+a+body+check+in+basketball In PDF document text
    • https://cdn.sqhk.co/jakufomego/MMIhahj/my_indpay_app_is_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5ff9eef3107a2.pdfIn PDF document text
    • https://nirodafudo.weebly.com/uploads/1/3/4/6/134697392/8039096.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/diaTdLL/68905483023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470035/normal_6000b3197f4bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_5fd65b8f454a3.pdfIn PDF document text
    • https://virefogagivagu.weebly.com/uploads/1/3/0/8/130815228/220766.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_5fd8cab7b51db.pdfIn PDF document text
    • https://sarisakela.weebly.com/uploads/1/3/5/3/135308925/xaladilopijajitoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403822/normal_6053c466bb3b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_6057f8d96839b.pdfIn PDF document text
    • https://lopuvekire.weebly.com/uploads/1/3/0/8/130813144/rusodofel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417834/normal_600e5ca45750f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_604b33bcde6af.pdfIn PDF document text
    • https://zejafopo.weebly.com/uploads/1/3/4/5/134505046/finunuletuwajud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426953/normal_5ff0c4c88d23a.pdfIn PDF document text
    • https://butilitari.weebly.com/uploads/1/3/3/9/133997497/dujag-sasewebekosirib.pdfIn PDF document text
    • https://lipuguxe.weebly.com/uploads/1/3/0/7/130738524/kewumipuxasutu.pdfIn PDF document text
    • https://cdn.sqhk.co/zasokolof/ICghght/69289402725.pdfIn PDF document text
    • https://bopevifobomamak.weebly.com/uploads/1/3/0/8/130814579/xuxelakiguvasad.pdfIn PDF document text
    • https://cdn.sqhk.co/tudenireso/icwhcgj/50901932158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530910/normal_6052d409b5c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_60233a551869a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413454/normal_5ff679f9a2161.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D8A 5248 bytes
SHA-256: e83858701e50e9e8b62ba3283690d8fcb22aa4aec105fe3b8e0cfcd529df4280
font_01_sfnt_off00012f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F74 10880 bytes
SHA-256: 453d2ec833af7fb193ce0f3f1f2b4f63b7da5515caf7ceb60d22c83bc65cfe63