Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3427e96ffa16475…

MALICIOUS

PDF

76.7 KB Created: 2021-03-01 05:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a93ab0cfcda2fab1c7432ac2775613f3 SHA-1: c9aaa5585429df2282edea9afe32a2063363da68 SHA-256: d3427e96ffa16475611b690856c1335eec2339dd81ceded93c0162152ab15343
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to seemingly random PDF files, indicating a link farm or SEO spamming operation. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=organic+chemistry+2+review+final+exam+questions+answers PDF link annotation
    • http://dajexori.mypressonline.com/americas_test_kitchen_freezer_recipes.pdfIn PDF document text
    • https://gaxadujabe.weebly.com/uploads/1/3/0/7/130775632/pevufizasuvatoz.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/84040576531.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/iCgi02l/jodiwel.pdfIn PDF document text
    • http://rigudozefogo.mypressonline.com/66681115448.pdfIn PDF document text
    • https://cdn.sqhk.co/titukopano/idFicnh/learning_spanish_beginners_books.pdfIn PDF document text
    • https://tovibibuxajewen.weebly.com/uploads/1/3/5/9/135968099/rimazigadifaferewo.pdfIn PDF document text
    • https://kabuxezalexafa.weebly.com/uploads/1/3/0/8/130814122/zonubo-judubu-lilosovegu.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/gMidjjc/texas_governor_election_2020_candidates.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/what_are_all_the_warrior_cats_names.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikagisato/Mibheij/xubabukajutape.pdfIn PDF document text
    • https://cdn.sqhk.co/jerivudofin/hjgjjg5/black_christmas_ornaments_near_me.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://s3.amazonaws.com/gopuze/24502020255.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/ajax_fc_table_and_form.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/detozimaj.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/kerikeri_weather_report_new_zealand.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/30836282158.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/6406918472.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

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_off0000e00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00D 5784 bytes
SHA-256: 7e04292752990b5746ccd18b559cf64b5b13b6fa98c489a3cf8d3718cb5a5566
font_01_sfnt_off0000f3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B0 10424 bytes
SHA-256: 49fbc987b964a6800ba98e87fcc5c6795ecdc2989083d7a5f37c7110f3dbe758
font_02_sfnt_off00011765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11765 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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