Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2b3cc087d6fe0f…

MALICIOUS

PDF

76.5 KB Created: 2021-03-16 15:47:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5cdf76e8bb741b1589acafdd2b503804 SHA-1: 232250755843766ca9ef23ffeb78e713baf9c360 SHA-256: 4c2b3cc087d6fe0ff628e507b9668ca016e0f799051018d84a737881788c9a04
126 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm or phishing attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of numerous external URIs suggests an attempt to redirect the user to malicious content or phishing sites.

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
  • 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://dugedepap.ru/strik?utm_term=ignatius+study+bible+review PDF link annotation
    • http://bupetud.xyz/zombie_buster_blast_them_allmc58k.pdfIn PDF document text
    • https://kibanelamuvudu.weebly.com/uploads/1/3/0/9/130969844/39ee5e1fb13.pdfIn PDF document text
    • http://xivekoto.medianewsonline.com/ganesha_atharvashirsha_telugu.pdfIn PDF document text
    • http://bumawusuka.mypressonline.com/who_did_cain_in_the_bible_get_married_to.pdfIn PDF document text
    • http://shop-onlain.fun/dragonvale_world_removed_from_app_store7kw4n.pdfIn PDF document text
    • https://kapiromus.weebly.com/uploads/1/3/5/3/135345701/karalakinibulojut.pdfIn PDF document text
    • http://nodefiw.medianewsonline.com/15459906522.pdfIn PDF document text
    • http://smartcreditscore.info/american_journey_dog_treats_near_melnzha.pdfIn PDF document text
    • http://lukanovetefitef.22web.org/23270332471.pdfIn PDF document text
    • http://pokupka.space/xisebaxivxtu4o.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/how_to_unlock_kenwood_radio.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/charles_dickens_david_copperfield.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ef9d90ca-5811-4a1c-810e-75bcfae60121.filesusr.com/ugd/a33af7_28449835834f4587b4e3c1ccacfa1693.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa221b9-7480-42f5-8a46-da52b182e8b4/what_is_the_meaning_behind_the_chickens_come_home_to_roost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4653c74a-6043-4d3e-8eea-f5dd305f4b75/what_lenses_are_compatible_with_canon_rebel_t3.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_62157957d4d04436a732b2ae58506c43.pdf?index=trueIn PDF document text
    • http://simebowum.rf.gd/amortissement_acclr_ohada.pdfIn PDF document text
    • http://vegozuw.epizy.com/siritozuzen.pdfIn PDF document text
    • http://zaximibirada.epizy.com/wellness_kitten_wet_food_feeding_guidelines.pdfIn PDF document text
    • http://tufuripisaren.epizy.com/fotubodolemumo.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_off0000ecd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD2 5324 bytes
SHA-256: 62da23b38ec4ae8901520ced1871a46c2675745877fbe98f4ef374f729cdb90a
font_01_sfnt_off0000ff11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF11 11288 bytes
SHA-256: bd7295d94c4cd97f9d6602241b75e09e38b01986a1f72bc74f5a8c760e82af7a

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