Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80c6008641a54d5…

MALICIOUS

PDF

79.1 KB Created: 2021-01-30 11:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2365ae08bacf96bfdc068c9b9cbafed3 SHA-1: 7b1b1d7fa86fa10407b0d1412e357ba538681787 SHA-256: c80c6008641a54d52eb6a478049fbd6326725e924dc81914dab2204726ed60a0
284 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.007 JavaScript

This PDF document contains numerous links to external PDFs, many hosted on disposable domains, suggesting a link farm designed for SEO manipulation or traffic redirection. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update, a common social engineering tactic for credential theft or malware delivery. The presence of malicious redirector links further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wb?keyword=simple%20to%20do%20list%20chrome%20extension In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369315/normal_5ff954251b70c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382972/normal_6003cec3422b2.pdfIn PDF document text
    • https://cdn.sqhk.co/zesunotu/EdjehjG/skyrim_elder_scroll_blood_id.pdfIn PDF document text
    • https://titepusigob.weebly.com/uploads/1/3/5/3/135392267/wugifaboto.pdfIn PDF document text
    • https://cdn.sqhk.co/baresupujar/Ggcqxwx/bangla_to_english_translator_software_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/jiiijdf/vinusovalevidudi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470226/normal_601505625f60d.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/mjiheja/slots_online_real_money_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/1hijdhd/jobidibijigoxixofedudaw.pdfIn PDF document text
    • https://labufixurugon.weebly.com/uploads/1/3/4/8/134873424/vafakifono.pdfIn PDF document text
    • https://fudegedetet.weebly.com/uploads/1/3/4/7/134733785/7003354.pdfIn PDF document text
    • https://cdn.sqhk.co/gituxogud/jtC48hb/double_wrap_rope_chain_bracelet.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/qzEhbI8/28361501519.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/0tjingf/dr_driving_2_mod_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/lorotukogof/d9WcOYp/nuts_and_bolts_organizer_menards.pdfIn PDF document text
    • https://cdn.sqhk.co/tezikegoj/jjgfOhb/ceramic_artist_agsa_2020.pdfIn PDF document text
    • https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/80ce175f63d.pdfIn PDF document text
    • http://mavpa.fun/77892928715uoek9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386834/normal_5fde36857aeb6.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_off0000fa81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA81 5272 bytes
SHA-256: d2a0c5f2d0437006864e47189a70e41e379979071078dac7903fd4ced7f168b6
font_01_sfnt_off00010c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4D 10228 bytes
SHA-256: cb28604cbc4631db10867fd42e9a4186f48c9e6fd42660e5d91832e7876cfcbf