Malicious PDF — malware analysis report

Static analysis result for SHA-256 75e7b91e028a8f4d…

MALICIOUS

PDF

74.4 KB Created: 2021-03-14 05:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d16b8919d6099a19cc411127ccf1e107 SHA-1: 9f47faee4361e6f4fa8fec1a364848fb0164fdcf SHA-256: 75e7b91e028a8f4d3da5e2920408c2020fae000a54f74036a857feee218d694b
156 Risk Score

Malware Insights

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

The PDF file contains a deceptive title and numerous embedded links, many of which point to external websites designed to host additional malicious content. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a large number of links, likely for SEO manipulation or to distribute malware. ClamAV and ML classifiers confirm the malicious nature of the document, identifying it as a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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-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://maypoin.ru/wix?keyword=soclean+operation+manual
    • https://sifimimufiwiz.weebly.com/uploads/1/3/4/0/134000394/dexolera.pdf
    • https://cdn.sqhk.co/nusatabi/eKJRGNQ/1659662563.pdf
    • https://nuruvubapifak.weebly.com/uploads/1/3/1/4/131452890/kafadaza_nesokimuv.pdf
    • https://gizutiki.weebly.com/uploads/1/3/4/4/134478998/5193787.pdf
    • https://setupazaz.weebly.com/uploads/1/3/4/7/134772318/3196694.pdf
    • https://birupilanakok.weebly.com/uploads/1/3/4/0/134017156/subadosewiga_pubuxamuz_zevesepegipasu_nomaka.pdf
    • https://xazalonabi.weebly.com/uploads/1/3/6/0/136086847/e347790039b30.pdf
    • https://fasuwilobavofe.weebly.com/uploads/1/3/4/4/134489762/vebaninurumep-redujiripaf.pdf
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/d244f.pdf
    • https://tilinonulubun.weebly.com/uploads/1/3/4/6/134614078/2412752.pdf
    • https://cdn.sqhk.co/kogeledewafo/fxAhk3S/lefewigi.pdf
    • https://laxedojopepab.weebly.com/uploads/1/3/4/8/134896069/lafolek_lopujuxopadij.pdf
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/megugelobopidojuguje.pdf
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/4209617.pdf
    • https://wogazisaralo.weebly.com/uploads/1/3/1/1/131163660/8168647.pdf
    • https://radefikifuru.weebly.com/uploads/1/3/4/7/134723330/xalilex.pdf
    • https://cdn.sqhk.co/jagakutojut/hgjic70/nobabodunopit.pdf
    • https://legalages.weebly.com/uploads/1/3/4/4/134442537/dexili.pdf
    • https://nixixufusolawig.weebly.com/uploads/1/3/4/8/134882604/1415265.pdf
    • https://cdn.sqhk.co/bupedamarib/4hgh8WV/formula_1_live_scores_and_latest_standings.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pulujolatepuv/wimebegebowowiluma.pdf
    • https://s3.amazonaws.com/daniwodug/taco_bell_breakfast_menu_gluten_free.pdf
    • https://s3.amazonaws.com/sefabe/93813448033.pdf
    • https://s3.amazonaws.com/tikoweravisixu/how_to_get_unlimited_passes_on_episode_without_human_verification.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d02a.bin
33e5969469e3fab3fa28cbd198878702f115a26b789078f95193a1e61e771a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD02A 5004 bytes
font_01_sfnt_off0000e11f.bin
db953417029b22900b750a9e79322ed6daf31222fdd8c94a31921a5abe153a73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE11F 10584 bytes
font_02_sfnt_off00010555.bin
cc032a1d7efe9f52c63bdca4360dad9aff78fb14a47167d9e0089e6cc9416013		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10555 16232 bytes

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