Malicious PDF — malware analysis report

Static analysis result for SHA-256 83293757c87d91e0…

MALICIOUS

PDF

85.4 KB Created: 2021-05-13 17:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b5f1808a96409b32bca883435d13c2b4 SHA-1: 860cadac9f5323b55323e624d0cdb383be6967ee SHA-256: 83293757c87d91e0ee0d81f4b56120296fe4f1002e9278a5fae6c45475eb2dd7
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a malicious intent to drive traffic or distribute further payloads. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classification strongly indicate a malicious document, likely used for phishing or malware distribution.

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/strik?utm_term=is+there+a+new+moon+in+november In PDF document text
    • http://xuxikurov.mygamesonline.org/arthritis_back_exercises.pdfIn PDF document text
    • http://kepuxom.mypressonline.com/35601426178.pdfIn PDF document text
    • http://my-favshopd.online/78685141198qvmzz.pdfIn PDF document text
    • http://alternativeinfluencenetwork.net/bivawepoditasobupt1e6u.pdfIn PDF document text
    • http://swiss-gear-top.xyz/japanese_alphabet_katakana_a-_zhow83.pdfIn PDF document text
    • http://acupofjacob.com/best_drill_guide_jigmhs6a.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/581489679886ebgm.pdfIn PDF document text
    • http://geleostone.online/citizen_skyhawk_eco_drive_set_timegh836.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/pibabopuduj/abu_dhabi_police_logo_guidelines.pdfIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_39edd9e5edb041b791f47b6559caf180.pdf?index=trueIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_2797cc9c276b4f0b9cb80009c3780a61.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/6827478529.pdfIn PDF document text
    • https://348ddb29-83e1-4812-94a1-743b72ef9b42.filesusr.com/ugd/23b571_3ffde7b3e32b4115834a0e6377499d61.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/faxaxos/sorikuxokevawugof.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_00996822e0214b429554ff6f6ca865c6.pdf?index=trueIn PDF document text
    • https://de74b992-0de1-402f-a2cc-438209b178b2.filesusr.com/ugd/2693ef_ce514c00151f482896b3a2085ce10dd5.pdf?index=trueIn PDF document text
    • https://e5aadbcf-511f-4ee2-989a-4410a22eeed0.filesusr.com/ugd/64930c_a2c40b18659c45beb17a06148ae5ebaf.pdf?index=trueIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/why_am_i_always_drawn_to_the_moon.pdfIn PDF document text
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_1084418e2bb14ff6b517b74ed93e0646.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/keechad_ka_kavya_class_9th_question_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/rezijisozoge.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E6 5124 bytes
SHA-256: a03028e5ba9773584472f5216fbecab270a4ee2c15ebe8b05a839bed18ee1341
font_01_sfnt_off0001233a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1233A 11672 bytes
SHA-256: 561b34ed478cc4d3463c42375c2f2961ed6110dc6ddd6a179181d114e38ef2b9

Open this report in the interactive analyzer, or submit your own file for analysis.