Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3be67e6991fc43…

MALICIOUS

PDF

83.5 KB Created: 2021-02-25 22:19:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3e1a310025333831a02b3fd4a716e680 SHA-1: 7cf7588b509a26ade051aaf637f4fff9e37f4524 SHA-256: 0d3be67e6991fc43b4d1d9fb2c76e644a0082cdee1073b6fa226b59b858f10cb
244 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure and a large number of external PDF links indicative of a link farm. The ML classifier also assigned a very high probability of maliciousness. While no scripts were explicitly extracted, the nature of the links suggests a phishing or SEO spam campaign designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/123?utm_term=stihl+f5+56+rc+string+size In PDF document text
    • http://kumorafeg.iblogger.org/xaxojunejutatox.pdfIn PDF document text
    • https://butegipabozu.weebly.com/uploads/1/3/4/2/134235803/pigiwojoma.pdfIn PDF document text
    • https://tujeliwavujojow.weebly.com/uploads/1/3/5/3/135304707/1005971.pdfIn PDF document text
    • http://gulakami.22web.org/langston_hughes_high_school_death.pdfIn PDF document text
    • http://bekokasutam.22web.org/diagonal_guides_indesign.pdfIn PDF document text
    • https://vagobodowi.weebly.com/uploads/1/3/4/6/134600101/goxifejo-xisigu-xodugivagala-xuxog.pdfIn PDF document text
    • http://zibifasa.iblogger.org/bhojpuri_song_new_dj.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/8389056.pdfIn PDF document text
    • https://senorori.weebly.com/uploads/1/3/4/6/134641151/7eb2f04.pdfIn PDF document text
    • http://kawonipedo.22web.org/33712196149.pdfIn PDF document text
    • https://lapadodipelij.weebly.com/uploads/1/3/1/1/131164402/mupanebe-wowedukuwukemo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sesoxevanadike.epizy.com/project_report_on_attrition_analysis.pdfIn PDF document text
    • http://potopaf.epizy.com/car_alternator_working_principle.pdfIn PDF document text
    • http://vinuvomitatu.epizy.com/64493147267.pdfIn PDF document text
    • http://vetisuduxujin.epizy.com/mibumewugefu.pdfIn PDF document text
    • http://kofuzedu.epizy.com/firumonaxisiladaloxiwo.pdfIn PDF document text
    • http://suvumudupese.epizy.com/11418567814.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2C 5040 bytes
SHA-256: a9f4b082514aad5d84d04861f890059394d80fb437565a96a8ff3fa9991cefde
font_01_sfnt_off00010f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F49 10392 bytes
SHA-256: 3f2eb67787ff8e8a9021ecb045400cd5dac0eeadfca29c9a34bdfa14509708d4
font_02_sfnt_off000132ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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