Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d6eb8c98c2c905…

MALICIOUS

PDF

133.3 KB Created: 2021-02-28 15:48:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: accfc22614243c2a3f76b7760d516d89 SHA-1: 2da8dc0ca6fc90b0023b503fb92959689f605558 SHA-256: 74d6eb8c98c2c90525bf4391b55759a16cb3640835a1f611cc6f43d249bd2142
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains, indicating a link farm or SEO spamming tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards the use of JavaScript for redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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/award?keyword=como+se+cocina+la+cebada+en+grano PDF link annotation
    • https://fafotarume.weebly.com/uploads/1/3/1/0/131069904/8702333.pdfIn PDF document text
    • https://vopoxeja.weebly.com/uploads/1/3/5/3/135346001/9305346.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/daromibugijaz.pdfIn PDF document text
    • https://jebomifodav.weebly.com/uploads/1/3/0/8/130874614/f358dbc6c.pdfIn PDF document text
    • http://natur-green.fun/225203819318dxn3.pdfIn PDF document text
    • https://besixovit.weebly.com/uploads/1/3/5/9/135997460/zawukavajagufevinuga.pdfIn PDF document text
    • https://nelunozulugekis.weebly.com/uploads/1/3/0/7/130739970/216926.pdfIn PDF document text
    • http://xufelaketodo.getenjoyment.net/examples_of_critical_thinking_in_real_life.pdfIn PDF document text
    • http://sallles.ru/xumebum2jxi.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/1842940.pdfIn PDF document text
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/kenovuw.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/flow_shear_stress_equation.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8085108.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://kedisijusa.onlinewebshop.net/73983862042.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/87334452405.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/20980340433.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/excellent_camera_apk.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B149 2948 bytes
SHA-256: 2d1ad20f11c14335731f23393d4dc7d25719db181f8662c181c8113a632b9697
font_01_sfnt_off0001bbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBCF 5304 bytes
SHA-256: 3a25ba125a86413839a38ba627624c5a37e15834db4dd8d4d8ce4801afe681e0
font_02_sfnt_off0001cdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDB1 6148 bytes
SHA-256: 149738eb3e1d0bfb4a5732e89a115965e6f0cf3fc4971c694d3ce3619176544d
font_03_sfnt_off0001dd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD90 12232 bytes
SHA-256: 606b9451493ebeaf27a3a3327b7c3359c9a4271cf5fd78a551d076510ae5fa14

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