Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65d9ca81f38f87b…

MALICIOUS

PDF

73.3 KB Created: 2021-06-09 23:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e3c369ede0b0c74166fef48cadc050e8 SHA-1: 50a84c5a04ade129c996d1d92942cc03f61bd531 SHA-256: d65d9ca81f38f87bb11840615aaa24c8e77e113eb90924cbc435eb12d0c37138
186 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM, indicating it is part of a link farm designed to direct users to external sites. The embedded URL 'https://allytemp.ru/pbw?utm_term=download+file+crack+photoshop+cs6' strongly suggests a phishing or scam attempt related to software cracking. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://allytemp.ru/pbw?utm_term=download+file+crack+photoshop+cs6 PDF link annotation
    • https://subokolabipu.weebly.com/uploads/1/3/2/3/132303028/1918543.pdfIn PDF document text
    • https://bivamotitujodo.weebly.com/uploads/1/3/4/7/134712473/zinorulizonen_vikotewosedixak.pdfIn PDF document text
    • https://wobafedufuj.weebly.com/uploads/1/3/4/0/134012960/9808493.pdfIn PDF document text
    • https://kidofepakanuzok.weebly.com/uploads/1/3/4/0/134096393/1624315.pdfIn PDF document text
    • https://xujesosa.weebly.com/uploads/1/3/6/0/136090165/lufuja-vazolatiregexow-lodoponuluzu.pdfIn PDF document text
    • https://finelesazik.weebly.com/uploads/1/3/4/7/134715738/mopapufo_kamiboditodibog_wamuduzadapama.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/951b9d0c-b5ff-42b9-bbdf-1680508a600a/ladupodenewaxirolexipus.pdfIn PDF document text
    • http://natofuke.pbworks.com/f/gezipevijikevuzexuxuximuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c1ad6b-40de-406b-99a2-74e542d6c687/minuzekilovuguripixevulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d817d4e0-5846-453f-b768-8006b1e64fd9/17118346864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b76402-9b87-4aba-ab82-f0ce0799adeb/jegizopokuzonuropiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82223086-8fcb-42d8-9575-147462f59c86/pioneer_av_receiver_vsx-523_no_sound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfd76b05-d5de-4ab1-b6c2-2bfce2bf06ec/pugijesuzidijepovemunef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/949eb17b-75d4-4282-ac8a-b21f820b640a/is_quinacridone_red_warm_or_cool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a74ae7-8123-4fac-9b00-c864e79a3de4/the_hound_of_the_baskervilles_1939_greek_subs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e25e979-5845-4c27-a8ba-2fb7b3526289/how_to_say_i_like_playing_video_games_in_spanish.pdfIn PDF document text
    • http://lulatigono.pbworks.com/f/21548114417.pdfIn PDF document text
    • http://wiwudoje.pbworks.com/w/file/fetch/144932505/apk_gta_vice_city_download.pdfIn PDF document text
    • http://dibesusajob.pbworks.com/w/file/fetch/144470859/82803736606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2980a945-df1e-45ff-a57e-6f9723a4f5e0/spiral_dynamics_book.pdfIn PDF document text
    • http://sapagujedok.pbworks.com/f/scripps_spelling_bee_2020_word_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293381da-811b-4306-b188-21ae49cc1882/82405588462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbc347cc-91a7-4b77-a413-2a2f05a266aa/11177434726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253b99e3-8f20-4f27-9aae-c89dfe829f54/general_data_protection_regulations_principles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e05b3a9-ec70-4503-a448-80b2d8a08fd7/how_to_pair_jvc_ha-s20bt.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_off0000e28f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28F 5552 bytes
SHA-256: 705c1e299a48cf8ad42d301128270203e9ed4692760c45df6d67f7b37e755519
font_01_sfnt_off0000f58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58C 9940 bytes
SHA-256: 362d0b544e1fc14d641e5165694bc964120bbf9f0005873386453a20a37c5672