Malicious PDF — malware analysis report

Static analysis result for SHA-256 58b22660de7038aa…

MALICIOUS

PDF

72.8 KB Created: 2021-02-25 20:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4da38af4ec834105b1984574c847ca2e SHA-1: 84e7df2466addce0ee51b3a0f7a4ad6a25a20643 SHA-256: 58b22660de7038aa3a6b0296e8d5d97e8b3eb425ded08c101c9f20fd19614722
244 Risk Score

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/wix?keyword=love+marriage+astrologer+in+wellington+nz In PDF document text
    • http://robinmani.site/xukefwzvpw.pdfIn PDF document text
    • https://cdn.sqhk.co/tusujoxaseru/jLiahiT/jekatibaju.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/DED5Vhe/small_square_paint_brush.pdfIn PDF document text
    • https://pojojozujivalim.weebly.com/uploads/1/3/1/1/131164399/abf161.pdfIn PDF document text
    • http://spainsale.pro/babenugejusen2sa7b.pdfIn PDF document text
    • https://cdn.sqhk.co/rexukewanej/diajcgi/ridor.pdfIn PDF document text
    • https://cdn.sqhk.co/zefafulolit/ijmUGjc/24933644435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443810/normal_60059c5c458c6.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/TxyidVk/78274497832.pdfIn PDF document text
    • http://immorta-cross1.club/66225778536j9tlq.pdfIn PDF document text
    • http://podcard2020.site/blubber_judy_blume_freeq4354.pdfIn PDF document text
    • https://cdn.sqhk.co/lupokuna/jdmgfgf/zombie_clash_zombie_tsunami_3ds.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/eijbjaz/90568872893.pdfIn PDF document text
    • https://pufedoxavode.weebly.com/uploads/1/3/4/6/134613169/5059802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/nobarowowetezudakigobeg.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/michigan_involuntary_manslaughter_sentencing_guidelines.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D2 5148 bytes
SHA-256: 434f7b61f6702f162e4251c4b517f6fba787e16ab44ca18826ae50b5cb322198
font_01_sfnt_off0000f35b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35B 10196 bytes
SHA-256: f008e306b5ebc10477fe627a874ef3c7fff5fa36da4dc156b42c94a529f3e0b1

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