Malicious PDF — malware analysis report

Static analysis result for SHA-256 106f302a738a238c…

MALICIOUS

PDF

147.1 KB Created: 2021-06-10 08:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd3f5104c00603cf4d5f4b05425d7942 SHA-1: a73a0b388575991f71b4d9ebfc0e769cc381a761 SHA-256: 106f302a738a238c28dc9a10cc825a3b6cd88c42ca0fbdb48f56b142270debea
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that appears to be a lure for downloading content, likely malicious. The presence of external URIs and the overall detection suggest the file is designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://chcial.ru/pbw?utm_term=one+thousand+and+one+nights+stories+pdf
    • https://vowimodinin.weebly.com/uploads/1/3/4/5/134599446/5874568.pdf
    • https://bopifodefow.weebly.com/uploads/1/3/4/3/134383970/11050308c11c774.pdf
    • https://dilasakezonaxos.weebly.com/uploads/1/3/0/7/130775260/niluzotajojafivut.pdf
    • https://nelupevono.weebly.com/uploads/1/3/4/3/134305158/gobuw_wuvumajewemuzar_pizibugixa.pdf
    • https://nawomabikovuz.weebly.com/uploads/1/3/4/7/134730946/bizisunoj.pdf
    • https://biweworu.weebly.com/uploads/1/3/4/5/134525234/341a55ada2f7b13.pdf
    • https://sevenunoxesu.weebly.com/uploads/1/3/4/3/134341304/sowajegunuguwowemik.pdf
    • https://defuboxuzunusam.weebly.com/uploads/1/3/3/9/133986960/febutalafaza.pdf
    • https://tujakiko.weebly.com/uploads/1/3/0/8/130814553/taguputo.pdf
    • https://revibafejinaj.weebly.com/uploads/1/3/4/4/134485322/romovazom_rubijafojomi_zilobikulaveluv.pdf
    • https://xelavizagak.weebly.com/uploads/1/3/5/3/135325118/tuwig-nejuvas.pdf
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/xefuvidopumezik_fatire_vumawukuboxipap_wanogopafife.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4c4e462d-970b-4cc4-a650-ad9cb20e8200/define_upwards_in_a_sentence.pdf
    • http://gaxoxim.pbworks.com/w/file/fetch/144574935/uninvited_lysa_terkeurst.pdf
    • https://uploads.strikinglycdn.com/files/f33c3946-891c-4f18-9b79-8b698b52f6e8/32100475101.pdf
    • https://uploads.strikinglycdn.com/files/f3ace7d7-c1cc-4885-bfdc-2348dd64cf82/vibexewamerufagibawasu.pdf
    • https://uploads.strikinglycdn.com/files/cdba036a-b3c9-4074-9194-e146dc8bf462/what_are_the_advantages_of_tree_topology.pdf
    • http://pamotekegopa.pbworks.com/f/89658924208.pdf
    • https://uploads.strikinglycdn.com/files/80b0cc8f-2181-4975-9382-c9567e327b4b/knex_bridge_instructions.pdf
    • http://lipadune.pbworks.com/w/file/fetch/144412608/54954719645.pdf
    • https://uploads.strikinglycdn.com/files/44419e88-bb0e-46f5-8cac-c71b3615a8f1/high_wizard_leveling_guide_ragnarok_mobile.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00021d09.bin
904c805d271478dc6472243393ed5280ca2f8ab95cd9eeadf61d7eda71d5087a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x21D09 19900 bytes
font_00_sfnt_off0001e028.bin
a9c79398722dba947bc05ade1001031625ad6a1608f6aef5c5f1d64d86023617		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E028 5300 bytes
font_01_sfnt_off0001f228.bin
665a921f12ab66f580a9e99624e4aa45196fad6e0fe070d7a6157798041a4f41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F228 14328 bytes

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