Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d579cb3a829f7ec…

MALICIOUS

PDF

77.8 KB Created: 2021-03-09 23:10:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 38ee72ec719a2f43eb08088d18940d67 SHA-1: 597e6970d2262b90c960688bd7b820b7bfba5f3c SHA-256: 2d579cb3a829f7ece3bad1a3c89d13777553201380d2c25e5b5c96fde3295979
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 0.9992

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://crophysi.ru/strik?utm_term=what+is+the+cost+of+whirlpool+refrigerator PDF link annotation
    • http://lopamusagolo.iblogger.org/video_facebook_page.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/what_motivated_european_exploration.pdfIn PDF document text
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/04d09.pdfIn PDF document text
    • http://merokomazojewi.scienceontheweb.net/71712224386.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/how_to_fix_a_noisy_insinkerator.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/good_group_topics_for_elderly.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/monitujexagijo_sotuvo.pdfIn PDF document text
    • http://xozowilozoga.mywebcommunity.org/batson_v_kentucky.pdfIn PDF document text
    • https://karadirivesu.weebly.com/uploads/1/3/1/4/131407010/f0797f90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_c83c6657f9fb478f94f7428f13e2831c.pdf?index=trueIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_821b84605c394bff8877672a63829557.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/noxawofe.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/coliforms_in_drinking_water_acceptable_levels_uk.pdfIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_b22b4b07716d4e068cc24baa46435a92.pdf?index=trueIn PDF document text
    • http://jajabidabewaw.rf.gd/23400226110.pdfIn PDF document text
    • http://kivekovojador.epizy.com/aleatha_romig_convicted.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/edible_oil_refinery_process.pdfIn PDF document text
    • http://zafediluxewo.rf.gd/90068642435.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/negoxinajidum.pdfIn PDF document text
    • http://lojubefogugiku.onlinewebshop.net/the_uses_of_enchantment_bettelheim.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/wawanesa_life_claim_forms.pdfIn PDF document text
    • https://d525ee04-2a40-494f-8ba9-fee52f7b18ee.filesusr.com/ugd/8b8e24_275a971553e747d6a0fedc23a48c0c6b.pdf?index=trueIn PDF document text
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_51e6a2873390436fab64f9d164b73cc1.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f29b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29B 5384 bytes
SHA-256: fca63b5128ac2df23d0a3ec1743d7d6eb74fb06cc660355ad47fddcce39929d3
font_01_sfnt_off00010504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10504 10640 bytes
SHA-256: e1d5b0c37faa89033f63638d0089825de8360be78a0002f108ff5e157492f5de