Malicious PDF — malware analysis report

Static analysis result for SHA-256 8844b2eceeaff890…

MALICIOUS

PDF

73.9 KB Created: 2021-03-13 13:57:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8921bb466a5a6028c8cb91c3c9cae324 SHA-1: 513ff612021fdc78c908df454214291e8ff05aa4 SHA-256: 8844b2eceeaff890d4c7ffc0208afe76314c05510fe7b925b64f0b398a60f51c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The document body, though heavily obfuscated, suggests a lure related to 'vocabulary workshop answers', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • 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://vilenefex.ru/aws?utm_term=vocabulary+workshop+level+f+unit+2+answers+synonyms
    • http://vovality.club/87170358878ixlo5.pdf
    • https://devonejejarib.weebly.com/uploads/1/3/4/6/134608322/wizapigu_fesapit.pdf
    • http://naliputa.mywebcommunity.org/scott_aaron_winston_salem_nc.pdf
    • http://speak4pro.com/what_are_payment_terms_in_a_contracthw07i.pdf
    • http://nazorizuz.medianewsonline.com/85676111724.pdf
    • https://watorixaziju.weebly.com/uploads/1/3/4/5/134586039/rerazedowuketokib.pdf
    • http://sifinujox.sportsontheweb.net/53734745332.pdf
    • http://gibelineg.sportsontheweb.net/59632606276.pdf
    • http://rujewazaxijaza.sportsontheweb.net/vaxubifiladesofop.pdf
    • http://zesenadozefut.sportsontheweb.net/30449858968.pdf
    • http://tadosuzewamu.medianewsonline.com/somikividimutoruga.pdf
    • http://copyrightnotices-form.com/414391018123bby4.pdf
    • https://lalupapetawosi.weebly.com/uploads/1/3/2/8/132816164/muzaxiluwipiv_felaf_xalad.pdf
    • http://bozesedixek.mywebcommunity.org/sawotiz.pdf
    • http://mujabelor.mywebcommunity.org/kipijometenedirosu.pdf
    • http://productwood.ru/5795000083811uzp.pdf
    • http://tomogorman.com/xulanegewewimawptt96.pdf
    • http://memaberenux.scienceontheweb.net/edital_auditor_fiscal_df.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/49b44e4d-e45c-4cc6-b39c-fca54b4eb2da/dipijokuteri.pdf
    • https://uploads.strikinglycdn.com/files/73b80e42-467c-4e67-8d28-bd0e2bc15458/20339196849.pdf
    • http://zorikeroz.onlinewebshop.net/how_to_sync_sony_mdr-zx220bt.pdf
    • https://uploads.strikinglycdn.com/files/aa9d48b9-953b-44f9-b55a-8a2eab37eac5/is_death_note_manga_complete.pdf
    • https://uploads.strikinglycdn.com/files/e2c1a8bc-a087-41a7-b390-08a172ca77eb/steven_pinker_enlightenment_now_chapter_summary.pdf
    • https://uploads.strikinglycdn.com/files/5e9260b1-9314-4113-ae1e-43783b4b1782/is_it_normal_for_couples_to_have_arguments.pdf
    • http://futebowa.atwebpages.com/animizm_nedir.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_off0000e2d6.bin
d40624245962214d6052fb3a07b15a52d4185a8673e5bccb5de92cca799f1dba		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D6 5808 bytes
font_01_sfnt_off0000f694.bin
aa1566e1aef6a4c3afbc1b4e96a361a15ca9592f4002136cd16a53c2de5fb859		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF694 10320 bytes

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