Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1fc0619a7e0a53a…

MALICIOUS

PDF

81.5 KB Created: 2021-03-06 08:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 231200203cb647933d5afcda21d8c0b0 SHA-1: 9d2095a9bb2294b3cfb62fddb7d8753b18bcf45d SHA-256: c1fc0619a7e0a53a1a9d99e5158005a1aa852c46a7747e396a89d3de6798161b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fokemale.ru/strik?utm_term=how+to+cook+quinoa+in+aroma+rice+cooker PDF link annotation
    • https://sogakuguw.weebly.com/uploads/1/3/1/4/131453515/ripavunukarened_kagizi_wixaboxemitabor_nozetim.pdfIn PDF document text
    • http://begimux.iblogger.org/zakapisekut.pdfIn PDF document text
    • https://ridewavovelomu.weebly.com/uploads/1/3/4/6/134697160/c338bf3ab1.pdfIn PDF document text
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/0311426d26.pdfIn PDF document text
    • https://ximesadi.weebly.com/uploads/1/3/0/9/130969353/jabigomuzez_jopubelivug_diferaguxobapes_kemedozi.pdfIn PDF document text
    • https://sagolofuba.weebly.com/uploads/1/3/4/8/134873879/rekava.pdfIn PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/kosoxumatokekak-rokube.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/87214e1b392.pdfIn PDF document text
    • https://sufifova.weebly.com/uploads/1/3/4/7/134736026/7024687.pdfIn PDF document text
    • https://ridogorizaloliv.weebly.com/uploads/1/3/4/5/134527302/65e4bc3.pdfIn PDF document text
    • https://gogodelile.weebly.com/uploads/1/3/0/9/130969080/jodewuvadesepe-kexexerexadipu-worow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_11250a93338241c29aab1620c03b03ac.pdf?index=trueIn PDF document text
    • http://tafoboverel.epizy.com/rupiwolewa.pdfIn PDF document text
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_c9b7b2d5d4704a12a14640d9ca8a4a10.pdf?index=trueIn PDF document text
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_b92d89da334940dfb61f863a8dfd0e3e.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_cd1d3b8bda9049ffa76077d2d4e6814f.pdf?index=trueIn PDF document text
    • https://1a441fb4-51dd-4528-a053-eb59ff664e18.filesusr.com/ugd/43d9d5_70d1902a728846f49d79bca75d4e3220.pdf?index=trueIn PDF document text
    • https://cda84be5-0c54-4c05-8389-97bb004c798d.filesusr.com/ugd/fa9f00_e780a29d375646068e94c3ce1eeb51a9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/formation_biologie_mdicale_au_senegal.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/37154414461.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/vodijipejipijekajag.pdfIn PDF document text
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_e90db101962941e290ed189d533672ff.pdf?index=trueIn PDF document text
    • http://zikomum.epizy.com/rpg_maker_vx_ace_lite_free.pdfIn PDF document text
    • https://0fdd9f25-8366-4660-9463-376fd915ad39.filesusr.com/ugd/c16cf9_b937f3d0abf34668b58d2e40579037c5.pdf?index=trueIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_d026a23a3baa446fb539a6955aa2dff1.pdf?index=trueIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_d6d90487611b4ab7b15ff4a867e1f04a.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 4860 bytes
SHA-256: 1229f492554d714c89d031d3d74bd5ff436225d6bffb9f2d3dcceeec5853e9eb
font_01_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 10236 bytes
SHA-256: dcf46c37f5b31358c92cd93109f1032cea416743c9c7d6a96e45dfc74fb1935a
font_02_sfnt_off000129e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E1 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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