Malicious PDF — malware analysis report

Static analysis result for SHA-256 81009f56a5103f37…

MALICIOUS

PDF

93.1 KB Created: 2021-03-24 23:30:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd195e1f047dbb62020d59d798802d61 SHA-1: 19e58c304bb4a9cd69b22659a60a2303b6275279 SHA-256: 81009f56a5103f376f1dfc0192c863db8d60110660216b7d5e9aa5caa5aaf54a
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or social engineering attempt to trick users into downloading further malicious content. ClamAV detection and ML classification strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/wix?keyword=warren+wiersbe+psalms+pdf
    • https://vizegibog.weebly.com/uploads/1/3/4/4/134458583/49fbb4.pdf
    • http://kernig.online/808245452875azix.pdf
    • http://gifagudilul.mypressonline.com/12816220477.pdf
    • http://kaxavetaxudu.mywebcommunity.org/42667021750.pdf
    • https://patapirebitogi.weebly.com/uploads/1/3/0/8/130814085/jipogumazaz_pidifalaxosise.pdf
    • http://study-english-05.site/wevunevoq04ix.pdf
    • http://cleaner360.shop/mozilla_firefox_49.0_2huw5f.pdf
    • http://erogan-columbia.site/infamous_first_light_ps4_trophy_guidepffh2.pdf
    • http://feludekinopotas.scienceontheweb.net/18654687164.pdf
    • http://kopuvimu.scienceontheweb.net/sapemoxisigupo.pdf
    • http://lukisasore.mywebcommunity.org/quantitative_aptitude_tricks.pdf
    • https://varukixenusenat.weebly.com/uploads/1/3/4/7/134700479/fc946422.pdf
    • http://shortsomfj.space/milavulesokolo5ch9v.pdf
    • https://gisixumaxen.weebly.com/uploads/1/3/1/8/131856636/gowezozef.pdf
    • https://jofanota.weebly.com/uploads/1/3/2/3/132302765/nasur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jedaxopopuko/who_sells_campbell_hausfeld_air_compressors.pdf
    • https://s3.amazonaws.com/kavugusepe/android_studio_project_version_number.pdf
    • http://zatuvejamubolo.atwebpages.com/38872427388.pdf
    • http://wikeratofi.epizy.com/ejemplo_terapia_cognitivo_conductual_para_depresion.pdf
    • http://xezaretidatoro.onlinewebshop.net/kegunaan_daun_binahong.pdf
    • http://roveramo.atwebpages.com/wokijubijibopepe.pdf
    • https://s3.amazonaws.com/tumuzu/dewalt_dcd771c2_20v_max_lithium-ion.pdf
    • http://pefijolal.rf.gd/40491429109.pdf
    • https://s3.amazonaws.com/sefepugolupalax/gutefobig.pdf
    • https://s3.amazonaws.com/jejulurowev/handouts_powerpoint_template_free.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_off00012f31.bin
3950588f59fb9ace9fae2b764de71fc3273634eb26cc15aeaec41a4dfc103c26
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F31 5432 bytes
font_01_sfnt_off000141a6.bin
41cf3842ac7e3700006954bb0deb939401b7ab3f1e8ba558d5cc7aa3de36005e
pdf-font-stream PDF embedded font (sfnt) at offset 0x141A6 11020 bytes