Malicious PDF — malware analysis report

Static analysis result for SHA-256 300dd706d81c00d1…

MALICIOUS

PDF

78.5 KB Created: 2021-03-13 13:16:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 521cd6150cf9214ed73fe3accbf3b820 SHA-1: db8d9bb300e96d13504f4c66e2ceb5ee164d193e SHA-256: 300dd706d81c00d10f3c51245b6a2f995fe0bb0253e6ade382f948045c2f111e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One of the primary URLs, 'https://seumenha.ru/wix?keyword=from+where+do+local+governments+in+georgia+get+their+power', is directly associated with the document's apparent topic. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is used to host and promote malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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-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://seumenha.ru/wix?keyword=from+where+do+local+governments+in+georgia+get+their+power
    • http://nijowefipegivu.iblogger.org/emuparadise_ashes_cricket_2009_apk.pdf
    • https://kuvezuwuziteb.weebly.com/uploads/1/3/4/3/134388010/a5133fc20ddbc81.pdf
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/8832443.pdf
    • http://vefobekusira.iblogger.org/catalan_conjecture_proof.pdf
    • https://vopifubuk.weebly.com/uploads/1/3/1/6/131636719/movagekosanota.pdf
    • http://doxugivo.22web.org/vanezisoro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xeponodij/vijafizetakilalojuwi.pdf
    • https://s3.amazonaws.com/dabatisew/wuvava.pdf
    • https://s3.amazonaws.com/difigomisosak/office_building_design.pdf
    • https://s3.amazonaws.com/vovopafubipu/css_stylesheet_in_html.pdf
    • https://s3.amazonaws.com/jenagubadopi/xujemudo.pdf
    • https://s3.amazonaws.com/sefipa/71998170973.pdf
    • https://s3.amazonaws.com/pisik/yooka_laylee_impossible_lair_achievement_guide.pdf
    • http://rifezovepon.rf.gd/aaxa_p300_neo_smart_manual.pdf
    • https://s3.amazonaws.com/tigewibejageju/19299894707.pdf
    • https://s3.amazonaws.com/jaxesabi/grok_learning_blockly_answers.pdf
    • https://s3.amazonaws.com/fidobakipivogit/91693864144.pdf
    • https://s3.amazonaws.com/gomaxod/platform_78_cafe_bandung.pdf
    • https://s3.amazonaws.com/fosalizuzu/janabuvibo.pdf
    • http://kuzelewekupe.epizy.com/liwew.pdf
    • http://naturesivox.epizy.com/youngs_modulus_of_mild_steel_in_kg_cm2.pdf
    • http://sarupisegov.rf.gd/5e_necromancer_guide.pdf
    • http://sepusuvom.epizy.com/is_canon_90d_a_professional_camera.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_off0000f5ee.bin
6806b31db1deda1653637e494c9241fd568032f8c4d7591c599fcbd2afbe8ce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EE 5596 bytes
font_01_sfnt_off000108e4.bin
9d152f37376b8d892a576002fd9a56819a058a60677d7cfc8d7635dc9c5b7cbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E4 10272 bytes

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