Malicious PDF — malware analysis report

Static analysis result for SHA-256 278623a5089cb1e5…

MALICIOUS

PDF

71.6 KB Created: 2021-01-13 16:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5528872d1caeaf0c9b2d7f04e47f6ca8 SHA-1: 283189f8c9bef2ee830f0acb7a8d63a9f74e4656 SHA-256: 278623a5089cb1e510ba8204a867f30db39645dc13672353976cf08c4131d7d2
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as a malicious redirector and link farm. It contains a large number of embedded URLs, many of which point to suspicious domains. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://gettraff.ru/aws?utm_term=sheetrock+screws+or+nails In PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/wosun-povelosu.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/jjxhgib/lowanosefi.pdfIn PDF document text
    • https://lituveso.weebly.com/uploads/1/3/4/3/134362288/1393503.pdfIn PDF document text
    • https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/sugufugiwokoji.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/zebubirememo.pdfIn PDF document text
    • https://fadefewili.weebly.com/uploads/1/3/4/3/134316521/29581.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/lejiti_ruziludazexaras_lovabex.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/gapivegek/27795477029.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/zokazenazepe.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/24460667279.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/22651009815.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/jajokivukiximosodedenuse.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/como_hacer_referencias_bibliograficas_apa.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/lajudidolefajofaju.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

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_off0000dd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0E 5148 bytes
SHA-256: cca47d3b02d286b6e79a3f59a7e76faa21c5501da4fec861a43cfbde54f97acc
font_01_sfnt_off0000ee9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 10344 bytes
SHA-256: b4450df59783dca1fa7426c796d911eab9efea4a5cafe2f37ce3af9d5321c59e

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