Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaa8e4cbd2c2b4c…

MALICIOUS

PDF

87.0 KB Created: 2021-02-25 08:01:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4ca341a9928f645ead2d0c282824b48a SHA-1: 60fdf20f13aa52c787e9c02f9bc8987c9f62074e SHA-256: eeaa8e4cbd2c2b4cea3e16a166e5c2194248486a9c8f02551e2fad93e6455a26
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or malicious redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://druttle.ru/aws?utm_term=best+hand+warmer+packets PDF link annotation
    • https://lovapunosarimol.weebly.com/uploads/1/3/5/4/135401421/fimiwatut.pdfIn PDF document text
    • https://rurovipodi.weebly.com/uploads/1/3/4/0/134096689/b960660726.pdfIn PDF document text
    • http://ruzunolesar.iblogger.org/11017093053.pdfIn PDF document text
    • https://pisekubil.weebly.com/uploads/1/3/4/3/134322001/mesosatipu-savezu.pdfIn PDF document text
    • https://lirisuvobuku.weebly.com/uploads/1/3/5/3/135399047/rapiluni.pdfIn PDF document text
    • http://rugavup.iblogger.org/hoover_model_uh70210_belt_replacement.pdfIn PDF document text
    • https://livugazenexaru.weebly.com/uploads/1/3/1/6/131607095/45c7965.pdfIn PDF document text
    • https://muzuxagofonokow.weebly.com/uploads/1/3/1/4/131406885/70be04a31688.pdfIn PDF document text
    • https://penuwepilaxol.weebly.com/uploads/1/3/4/7/134756509/7168191.pdfIn PDF document text
    • https://bidefajiwi.weebly.com/uploads/1/3/4/0/134096082/wadimakokujofem.pdfIn PDF document text
    • https://rejurikin.weebly.com/uploads/1/3/1/0/131070637/zelusasoxibed.pdfIn PDF document text
    • https://jakoxizejibak.weebly.com/uploads/1/3/4/3/134348863/vedapav-tibov-nobebizefut.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/aaron_clarey_curse_of_the_high_iq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pikubub.onlinewebshop.net/how_to_do_the_google_thanos_trick.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/60120854304.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/130382583.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/98831821978.pdfIn PDF document text
    • http://zasizekid.rf.gd/speed_queen_commercial_washing_machine_parts.pdfIn PDF document text
    • http://nudobovedazopor.epizy.com/mabetusezini.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/limamitifoxokabogoketepu.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/what_size_battery_for_2008_dodge_avenger.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_off000102f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 5488 bytes
SHA-256: 14272a0ca6afc89507e2a579a91943e8a6a55aba2c361906a0fd1a17bf8dae92
font_01_sfnt_off00011588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11588 10412 bytes
SHA-256: b22dc1214fc6becf95255c1fdcea64f649b3440f71d882056bf899871e6f0b1f
font_02_sfnt_off0001396c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1396C 16144 bytes
SHA-256: f0a8b786da721c7415a59d91fbce3b20bbb98ea32e48857ac1ff22d53b00ec29

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