Malicious PDF — malware analysis report

Static analysis result for SHA-256 3707cbecee9fda17…

MALICIOUS

PDF

109.7 KB Created: 2021-03-24 23:23:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 67d47c85c3cf2fe6499da36a40de6619 SHA-1: 6fab3f14eef02413d3f3c08cb25e7d098ffbea97 SHA-256: 3707cbecee9fda17de42121d1b61ce58b4625fe880b99c047084c07d364bf23f
214 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including flagging it as a redirector link and a link farm. The embedded URLs, such as 'https://yafferge.ru/award?keyword=engineering+technical+drawing+pdf', are designed to lead users to potentially harmful content. The ML classifier also strongly indicated maliciousness, supporting the ClamAV detection of 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=engineering+technical+drawing+pdf In PDF document text
    • http://biparugudofozi.22web.org/simd_array_processor_in_computer_architecture.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366639/normal_601a100a2bb1f.pdfIn PDF document text
    • https://wodorolijuzawex.weebly.com/uploads/1/3/4/7/134770742/214918.pdfIn PDF document text
    • https://firudofomupavu.weebly.com/uploads/1/3/1/3/131384713/japipixurebavuju.pdfIn PDF document text
    • https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/e84b6acb8d43.pdfIn PDF document text
    • https://rilavowa.weebly.com/uploads/1/3/2/7/132740415/nowoguzes.pdfIn PDF document text
    • https://xopavomubikun.weebly.com/uploads/1/3/4/8/134879687/lazagafelub-kujegebesavewo-koxej.pdfIn PDF document text
    • https://dikemogegopur.weebly.com/uploads/1/3/1/4/131406608/434428cfd200e00.pdfIn PDF document text
    • https://jabefebilinoke.weebly.com/uploads/1/3/0/7/130739415/fbf1dab277.pdfIn PDF document text
    • https://filajusarapobu.weebly.com/uploads/1/3/4/7/134761194/2523423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425484/normal_5fd36d283ce7d.pdfIn PDF document text
    • https://vokedovewugom.weebly.com/uploads/1/3/5/3/135349322/rogonarujewunalovid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/55014978401.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/aac_format_video_player.pdfIn PDF document text
    • http://zewomasajeguzud.epizy.com/psalm_91_niv_bible_study_tools.pdfIn PDF document text
    • http://dojidusajotat.epizy.com/89645743249.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/vubito.pdfIn PDF document text
    • http://wigamewekafon.rf.gd/jojeduwikunovoviwo.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/borderlands_3_skill_trees_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/2786015366.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C32 5288 bytes
SHA-256: 77cdb587aab2bc4b4cbed4bea95ff044265155d36a3afa57552428f61cf70d08
font_01_sfnt_off00016e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E46 10884 bytes
SHA-256: 042972bb43029a8c8269fadee9f88697fefd4b60d83b124448fe3a519296ed88
font_02_sfnt_off000193f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193F3 16172 bytes
SHA-256: 1c1143839f05a5789524e75987812d4076a19e8c6e3280f717ab7b4921f49ba8

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