Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07001b9c1c3a020…

MALICIOUS

PDF

76.4 KB Created: 2021-01-30 18:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: d2b5ce2a9a00619685c30a3a45c7b0a2 SHA-1: 75ea81b13c23f11a133e212aec1136aec9a0962a SHA-256: d07001b9c1c3a02046d3e85be0abb12b14645f801e9ea55dc897c3c760f0762b
186 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large farm of external links, many hosted on disposable domains, suggesting a phishing or link-farming attack. The presence of numerous PDF links and the use of 'utm_term' parameters indicate an attempt to lure users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/123?utm_term=coweta+county+tax+assessor+map PDF link annotation
    • https://cdn.sqhk.co/rivitovolu/iffOP52/fadofoxe.pdfIn PDF document text
    • http://extrameets.fun/62365509938kw0sv.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/qrBidjh/zombie_party_decoration_ideas.pdfIn PDF document text
    • http://fullhp.info/woods_tents_set_up_instructionspbamg.pdfIn PDF document text
    • http://lienforkid.com/balloon_tower_defense_6_free_apkb0s67.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/ighcx1N/coloring_pages_brawl_stars_max.pdfIn PDF document text
    • https://cdn.sqhk.co/xisalaximel/dsVXhiG/13546759493.pdfIn PDF document text
    • http://mstmail.space/37031834195e28ie.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/kimem_borasapu_jilogazivi_risite.pdfIn PDF document text
    • https://cdn.sqhk.co/revipidamog/dlNwjda/kedopobixexuregageg.pdfIn PDF document text
    • https://cdn.sqhk.co/dexasubu/gwjhhap/glow_light_up_drawing_board.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/ihejcha/38130919579.pdfIn PDF document text
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/dagenuva.pdfIn PDF document text
    • http://hookup157.online/turexademokinomokonorjpgny.pdfIn PDF document text
    • https://cdn.sqhk.co/bizufunido/bif3oia/cubacel_etopup_online.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/2JGAwpC/5048704177.pdfIn PDF document text
    • https://cdn.sqhk.co/pinufizugal/dPiafmm/9227116107.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/gdNUhbZ/53704431540.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/ghLgi1t/greatest_hits_of_all_time_playlist_youtube.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6E 5164 bytes
SHA-256: 440d916be7ba206731773beae36233e813251b6d4fd251c447a86c45342cbba1
font_01_sfnt_off0000f0fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FC 10980 bytes
SHA-256: 30db60b975404394a53191a48480dfd40e40f5706c886fb07dda90f734421a9b
font_02_sfnt_off00011643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11643 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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