Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5119f33648725c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-29 04:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02e353b92ea90dc1343a7a0c9d8729c7 SHA-1: 7e9cb35b5c329fa34bb31ec612ee8e63306550d2 SHA-256: ad5119f33648725cb62999f59a59c83604d0b5e214f0c312c3ae1bb85ea8a0b3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malicious content or visiting a phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text suggesting a lure related to 'Hatchet chapter 12 questions and answers'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/wix?keyword=hatchet+chapter+12+questions+and+answers
    • http://znasila.ru/45499545969jr2yk.pdf
    • http://smilex.club/1587967849700bb9.pdf
    • http://lasleymarkt.ru/75357554216yepov.pdf
    • http://comforfemj.fun/what_is_chill_mode_teslad594l.pdf
    • http://fasajesova.22web.org/4_qul_shareef_download.pdf
    • http://wiregabjuk.fun/780740300460dyny.pdf
    • http://razidazimako.iblogger.org/84513220407.pdf
    • http://igbusinessabouthelp.com/86331304971zprp1.pdf
    • http://phrensy.co/jegasea7rh7.pdf
    • http://cabinetsly.xyz/85433159256v4ggc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://tamazodatitemi.epizy.com/sodezedujidovemox.pdf
    • https://s3.amazonaws.com/vapite/classification_of_antibiotics_based_on_chemical_structure_ppt.pdf
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_1721e0838b7a4ff18e8f3087514c33ef.pdf?index=true
    • https://s3.amazonaws.com/jipowumat/desobenefawolur.pdf
    • http://botovomevagexe.epizy.com/depakawamafivazinana.pdf
    • https://s3.amazonaws.com/kefefetafij/joxuruluxesivif.pdf
    • https://s3.amazonaws.com/bevekizadoxuj/22323481881.pdf
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_fefd4e74e8534aad9f13ae1f63f5e6e6.pdf?index=true
    • https://s3.amazonaws.com/dojivewobasuval/audio_naat_free_karam_mangta_hoon.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_off0000f1ff.bin
4d7dcf53b399eb9c3451a1dea0ad35ffbcc6001969bdd9357f19266004d73828		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 5492 bytes
font_01_sfnt_off000104ba.bin
f3ff94fb4e0fd1146c2659e4454e1b9185a59b3d00d8abd2f504f7febb982e21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104BA 10620 bytes

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