Malicious PDF — malware analysis report

Static analysis result for SHA-256 9699237a976a72d0…

MALICIOUS

PDF

85.4 KB Created: 2021-03-23 02:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 354458cc8ca085052f4e465b8ac46dc7 SHA-1: 844c8ab216826fc225fc60b8f6a8ac6d06e71a11 SHA-256: 9699237a976a72d0f717bca6dd4308eff739590b37961971f328c68f77fa7fa5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for link farms and phishing sites, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings point towards the document's primary function being to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/wix?keyword=french+revolution+test+questions+and+answers
    • http://lowuwirakob.66ghz.com/zazisumetunubipebagadoxek.pdf
    • https://jotevalosovem.weebly.com/uploads/1/3/4/3/134385082/287110.pdf
    • https://jajaleregonu.weebly.com/uploads/1/3/4/2/134235513/f7b078f9b9b.pdf
    • http://appletopshop.ru/78779508653843c1.pdf
    • http://baxijemapuzoxu.22web.org/abb_sieys_what_is_the_third_estate_1789.pdf
    • https://totovipuvo.weebly.com/uploads/1/3/2/7/132740708/9568751.pdf
    • http://igbusinessabouthelp.com/what_model_is_my_ezgojb8ut.pdf
    • https://bukenazupe.weebly.com/uploads/1/3/4/5/134584610/ravit.pdf
    • http://glawerry.online/bakilunolopigejutilevesu0fdbq.pdf
    • http://smartroom.pro/yiruma_piano_sheet_music_freem9b89.pdf
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/pitopotat.pdf
    • https://kunatelifarak.weebly.com/uploads/1/3/2/7/132712072/2237311.pdf
    • https://sotivozorome.weebly.com/uploads/1/3/4/7/134733800/91d00eeda16.pdf
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/xavigi-mizos-gozovewu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vutekumini.epizy.com/vixaguzobevujosog.pdf
    • https://uploads.strikinglycdn.com/files/fcb65975-fdea-4877-8c17-7470e9ae066b/mowozorasa.pdf
    • https://uploads.strikinglycdn.com/files/dee193c8-7130-42f1-85da-218e237f845a/tekegalafi.pdf
    • https://uploads.strikinglycdn.com/files/0bf6061f-ef66-42ff-a5e4-cfa9cc92d404/guzogulavi.pdf
    • https://uploads.strikinglycdn.com/files/7788b20c-86d5-4198-b142-4fbcb3ca114e/bach_cello_suite_1_used_in_movies.pdf
    • http://wotisonuli.epizy.com/can_you_replace_the_battery_in_a_tomtom.pdf
    • https://uploads.strikinglycdn.com/files/8c08b89c-a86c-4639-b739-3f94a390ce05/karcher_pressure_washer_customer_support.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ff6.bin
ba26b32d050bd18a5f69a4442cccda346a5550ca5163845b534d4aa668bd123d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF6 5260 bytes
font_01_sfnt_off000121e7.bin
e2f1deadb5cc8d72ab23274ecb76f26ac4c61deb4fbb72cf1738c3ebcda0832a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121E7 11244 bytes

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