Malicious PDF — malware analysis report

Static analysis result for SHA-256 797d315edd9c2e5e…

MALICIOUS

PDF

73.2 KB Created: 2021-03-04 00:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 1651f6f21fb542c00565eaec69bd7989 SHA-1: 58a54a1e22f372789ce86a2fcdfe4bc5464e3d66 SHA-256: 797d315edd9c2e5e9275b17925ae520c2acdbee360350e0fcb778f9e71ec695d
126 Risk Score

Malware Insights

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

The sample was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. Multiple embedded URLs point to suspicious domains, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://golowaki.ru/award?keyword=how+does+automatic+climate+control+work PDF link annotation
    • http://begemotiks.fun/google_chrome_android_hide_status_bar3xse4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_5fe1444d1ee41.pdfIn PDF document text
    • http://3gusevshop.space/star_wars_battlefront_2_trke_yamat5izd.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/YXiShhK/33113183764.pdfIn PDF document text
    • http://promooffer.site/32802439910ubks4.pdfIn PDF document text
    • https://jikudirag.weebly.com/uploads/1/3/4/0/134040407/3240584.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/cxMLdow/nonoboxawatalawen.pdfIn PDF document text
    • http://voztrans.ru/skater_xl_multiplayer_mod_not_workinga503i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408703/normal_5ff9a3f5019ec.pdfIn PDF document text
    • http://huseyincanx.com/15222809135kzl2s.pdfIn PDF document text
    • http://verification-help.com/58888065444mn6hr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367013/normal_5fc6137da38d7.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/NGYgfhb/defenders_of_the_realm_an_epic_war.pdfIn PDF document text
    • http://prodit.space/37769693095p1nem.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/zuvub_totapufufoxa_zuwukumujinege_risuvef.pdfIn PDF document text
    • https://forupiwiwipugo.weebly.com/uploads/1/3/5/3/135349306/jirigut-xofewopap-kidatunakab.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/jcgijgg/lewilorer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443588/normal_5fdaf4b117e38.pdfIn PDF document text
    • http://doctora.club/85214205999wlgxk.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/xukonakefules/zizoruja.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/gudunalib.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_off0000e2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D8 5200 bytes
SHA-256: 90d7f898ca2a3f5ec668081329668226242281ced472f8c88cfc0d2a4dd373c4
font_01_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 10448 bytes
SHA-256: 87fca3616a5e2b174687a2f9581db4060fd0f11d0278b206e4245fdb86f86215

Open this report in the interactive analyzer, or submit your own file for analysis.