Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0b71543987b85d8…

MALICIOUS

PDF

73.5 KB Created: 2021-02-17 22:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fa8c299c9535854c0fd9e74186d63d83 SHA-1: 059218fbbe17b33d3795936232cbc0b3e0030623 SHA-256: a0b71543987b85d85b7fb8168c2b0df97311538b096ce770d9305242f09050cf
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for phishing or malware distribution.

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
  • 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://yafferge.ru/wix?keyword=playmobil+zoo+3240 In PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/kadakekenarav.pdfIn PDF document text
    • https://gozerivolese.weebly.com/uploads/1/3/4/2/134265833/lomumukuzibupex.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/2393967260kpe3e.pdfIn PDF document text
    • https://sazopugewado.weebly.com/uploads/1/3/1/4/131453094/c254a.pdfIn PDF document text
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/2a7ea79a63603.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382639/normal_5ff7177318124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5fd7c28336479.pdfIn PDF document text
    • https://dopakujovifoba.weebly.com/uploads/1/3/0/7/130739833/bikedupozagafe.pdfIn PDF document text
    • https://pemolodubi.weebly.com/uploads/1/3/6/0/136052155/a53e5ae18e7d5d.pdfIn PDF document text
    • http://bubuwem.iblogger.org/42968156063.pdfIn PDF document text
    • http://organize.shop/rosuzuwafomivogoxizedulizxiliv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371244/normal_5ff9c9df489c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500446/normal_5fcf0b649344a.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
    • https://s3.amazonaws.com/salosibejodod/troy_bilt_tb110_gas_capacity.pdfIn PDF document text
    • http://saduxax.epizy.com/chhath_puja_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/kitatej.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/67544305546.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/xalunimolajibetekivaf.pdfIn PDF document text
    • http://sefuvasumujezoz.epizy.com/crusader_kings_2_conclave_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/3533587864.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_off0000d0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0FE 4860 bytes
SHA-256: 2a1a1b0f750f85e7705868aa19bfe933b3dcb7024ad9d9369d3183786d4daf1c
font_01_sfnt_off0000e18b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18B 12996 bytes
SHA-256: 9f5222c17731ba74afc5d1a33438e6f6df16da5c8aea716418145fbaffe167dd
font_02_sfnt_off00010ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD7 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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