Malicious PDF — malware analysis report

Static analysis result for SHA-256 178a32c5732b8b16…

MALICIOUS

PDF

80.8 KB Created: 2021-03-10 14:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 3244c69348fc1dc5dcaa2baa6a398eba SHA-1: 8a727dd145855bc617bb4da5e45f9c556a9d8ad3 SHA-256: 178a32c5732b8b16cfd8f1d0c2d4ed5184d7a1dcd881b739ce84e1e14979c7be
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are generated to appear as search results for technical documents, a common lure for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • 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://kuzutuzo.ru/wix?keyword=practical+reliability+engineering+5th+edition+solutions+manual+pdf PDF link annotation
    • http://prodson.space/vidaninujoropswkke.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/how_long_it_takes_to_study_for_usmle_step_1.pdfIn PDF document text
    • http://consequences.space/49863633733p7jht.pdfIn PDF document text
    • http://datingsexchat.site/pizomokilofiwepixwuos1.pdfIn PDF document text
    • http://dopogabijup.mywebcommunity.org/bipap_mode.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://7133fc40-0b9c-4701-b953-e7fafc934b44.filesusr.com/ugd/70a38d_9c04137a994541b4a1a927b8edf31778.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/77807344701.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_1f82655c9c274a7fb7caab6eb4608cc0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/najipavez/xiluzokodipexux.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/39204347447.pdfIn PDF document text
    • https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_ce468d0933b4435e98de61c94122c17e.pdf?index=trueIn PDF document text
    • https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_d84684526c7442d9a08ea118c8118741.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/22401862420.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/65240766368.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/muzofadixe.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/what_does_8_channel_security_camera_mean.pdfIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_9bcb329f0e8f423ab196b3b7803af1eb.pdf?index=trueIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_79ea9fd1c465454c8ec46b5e7e578ec7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/wametizi.pdfIn PDF document text
    • http://gixarewujedel.atwebpages.com/6775432660.pdfIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_aba8143e4e8a48a6b7bfb29ab9f90ee7.pdf?index=trueIn PDF document text
    • http://piwolimosopobu.myartsonline.com/nolidolas.pdfIn PDF document text
    • https://4e4301d6-cc9a-4939-960a-6b497c1efea6.filesusr.com/ugd/d78803_61a89560b81040bea8807e3057196679.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falevi/87534484126.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/coloring_worksheets_for_pre_k.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_off0000ef72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF72 5816 bytes
SHA-256: bf523d3a4f913d0e7db7d3acbf464789dd48c115e72b440ed09c4508deedc06e
font_01_sfnt_off0001030d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030D 10572 bytes
SHA-256: f3b98c28e30f816c126020edcc5a22d09a00aa15c757358fb4dd36897fe90c6a
font_02_sfnt_off000126e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E3 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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