Malicious PDF — malware analysis report

Static analysis result for SHA-256 781a4730845b6602…

MALICIOUS

PDF

84.1 KB Created: 2021-04-14 09:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: bd61f68edb1d68dbc8858c747d3d9aac SHA-1: b741f5ece8f4e73e4ce874d96ede9241c08031fd SHA-256: 781a4730845b6602c0bdfe46a8d1891cfc58f1aed7c5c862083bd3020e440617
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is a PDF file flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent.

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://soxebez.ru/strik?utm_term=what+ply+is+bernat+blanket+yarn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366311/normal_602f5eca6429b.pdfIn PDF document text
    • http://brumbum3.xyz/zeruzasovajomudesinaxupefdky3.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/VKmiiBX/download_game_spider_stickman_fighting_mod_apk.pdfIn PDF document text
    • http://8bitbeardsco.com/godozulunapilh2rao.pdfIn PDF document text
    • http://jumbochecker.com/football_manager_2018_apk_androidwv7gc.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/jehhgim/772830145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_6063fe351a06b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383137/normal_6043b2387c08d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387807/normal_5febdec447e73.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/ita5T4x/wastong_gamit_ng_malaking_titik_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/sebidurubuze/jgjhghd/piwugoxovekilozi.pdfIn PDF document text
    • http://lolkek.xyz/85841574406yjyrb.pdfIn PDF document text
    • https://cdn.sqhk.co/gadakoferupa/gi9icib/16655493727.pdfIn PDF document text
    • https://ruminugovukaka.weebly.com/uploads/1/3/0/7/130740017/fenaduwekaset.pdfIn PDF document text
    • https://gawotajar.weebly.com/uploads/1/3/4/5/134525297/voxifotul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_6054c706e802c.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/944806.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/bulikowexunepov/logitech_k400_connect_without_dongle.pdfIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_48b6b78a335a46b5b78c4c7ffed4bfd1.pdf?index=trueIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_357c1430f18d4a35b05def80e38a7971.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxorojero/xiaomi_mi_a2_actualizara_a_android_10.pdfIn PDF document text
    • https://bd04a250-715b-4db0-8087-55ec2f714cf5.filesusr.com/ugd/0c2191_3e7a0629c5c043f996a706c7e4bf2ba2.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10833 5224 bytes
SHA-256: 091c58c4773c9f4dff9c2ef2c239a15013116cb75e97af0fbbae333dc374bfc0
font_01_sfnt_off00011a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A02 11712 bytes
SHA-256: 31018812174d29216749271b10e940016f0f10dcd01079924f85ed751eebee2f

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