Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa6feb534bdb620…

MALICIOUS

PDF

71.8 KB Created: 2021-01-21 05:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 19c8b711cf5ecb673024c25daa9f6f3f SHA-1: c239f5eb01077821043e7b493a992f1424e361d6 SHA-256: 1fa6feb534bdb6209b614c75172ff3ca591279e0a22d7a3033eb5016e7e9d6fc
244 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The primary link directs users to a URL containing 'graco nautilus 65 washing instructions', likely a lure to disguise malicious intent. The presence of ClamAV detection and ML flagging further supports its malicious nature.

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://crophysi.ru/123?utm_term=graco+nautilus+65+washing+instructions In PDF document text
    • https://site-1244930.mozfiles.com/files/1244930/enterprise_architecture_patterns.pdfIn PDF document text
    • https://tuwureliw.weebly.com/uploads/1/3/4/1/134108737/lazebomijejosi.pdfIn PDF document text
    • https://sulasaboxa.weebly.com/uploads/1/3/4/7/134767053/zalexas-wubixokuwekiw-nisokaberom.pdfIn PDF document text
    • https://liganori.weebly.com/uploads/1/3/1/6/131637073/dulex_dufelenulujume_muduz_tatave.pdfIn PDF document text
    • https://zivixitusinuz.weebly.com/uploads/1/3/1/3/131380786/b038bcd4d.pdfIn PDF document text
    • https://site-1175189.mozfiles.com/files/1175189/calendar_december_2019_word_template.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/Righigf/friend_finder_online.pdfIn PDF document text
    • https://site-1180366.mozfiles.com/files/1180366/12565367330.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/bPidida/jet_boat_racing_calendar_2020.pdfIn PDF document text
    • https://site-1182058.mozfiles.com/files/1182058/shoot_live_zombies_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/rilowikapaz/ZFiaigD/special_warfare_recruiter.pdfIn PDF document text
    • https://zovipimisog.weebly.com/uploads/1/3/1/1/131163747/45dcc.pdfIn PDF document text
    • https://kirorasonosa.weebly.com/uploads/1/3/4/7/134743937/pemopakukuvu-taxesakufitej.pdfIn PDF document text
    • https://larulesa.weebly.com/uploads/1/3/4/7/134717423/rimuwusewofaz.pdfIn PDF document text
    • https://site-1171850.mozfiles.com/files/1171850/71642711790.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/jddjhaz/jungle_monkey_2.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_off0000dd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD91 5464 bytes
SHA-256: 57f8155a559e26b12a953f24c1673116b3958c0a5361d4f6530b41090aacfcbe
font_01_sfnt_off0000f033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF033 10032 bytes
SHA-256: 0f2177533a5fc0b2eae792bc43ab2dcdae3db247cd33d7de73f8243e989db049

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