Malicious PDF — malware analysis report

Static analysis result for SHA-256 326deaf4cd508287…

MALICIOUS

PDF

74.2 KB Created: 2021-04-07 21:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ace72a2923ecdd4b3bfe440e7daa27b SHA-1: 1e1c363fa169f9ef237e8a590f2e3d9fe8712b5e SHA-256: 326deaf4cd5082878d0949b9b3194c6558cba8738d3d8d866477666071bb457b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used in SEO poisoning or phishing attacks to drive traffic to malicious sites. The heuristic PDF_SEO_LINK_FARM specifically indicates a mass external link farm. While no scripts were extracted, the presence of external URIs and the nature of the link farm suggest an attempt to redirect users, potentially for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/aws?utm_term=millermatic+130+parts
    • http://teaitalis.space/miss_prepa_7_fotos_sem_censurahjjeq.pdf
    • http://front-glass.website/download_mobfish_hunter_modlqg3q.pdf
    • http://1xbet-football.fun/un_curso_de_milagros_audio_en_espaol5j5xv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dupula/film_allegiant_sub_indo_full_hd.pdf
    • https://uploads.strikinglycdn.com/files/d5d9d0b6-a2bd-4303-b2e3-e8a178d2e7bd/zakojobinixabopijezereku.pdf
    • https://s3.amazonaws.com/penale/34659931002.pdf
    • https://uploads.strikinglycdn.com/files/6defc8b9-7075-4f0c-a124-eafcb35b6203/audacity_in_english_language.pdf
    • http://jajoditad.rf.gd/abiyoyo_book.pdf
    • https://uploads.strikinglycdn.com/files/9dc6c963-cc48-4c91-9990-614ba2d190ee/driver_samsung_scx_4623f_per_mac.pdf
    • https://uploads.strikinglycdn.com/files/8f50db80-752d-4872-84c6-c3e9532b8aa7/metatex.pdf
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_045ee9baf9fd455f918037a1ddf9b057.pdf?index=true
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_cb2f8c17e6814e98b4b4fc07c79492cd.pdf?index=true
    • http://nipanalex.epizy.com/ontology_and_epistemology_definition.pdf
    • https://s3.amazonaws.com/kefodek/sakhi_telugu_movie_songs_free_320kbps.pdf
    • https://uploads.strikinglycdn.com/files/3f3f71ed-9009-4113-ade6-34b06cdc33b7/lajog.pdf
    • https://s3.amazonaws.com/donarepemi/cyberpunk_2077_ps5_or_ps4.pdf
    • http://furofazitogo.epizy.com/51755356689.pdf
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_70c520a7ad434e3eb7a238093f0e624b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/8a68d8aa-ece7-4a16-8747-bf3a9833e99f/zabuxidurugaverixamezuzu.pdf
    • https://502f924d-676a-41b3-8220-87c01882f600.filesusr.com/ugd/5a20bb_b76757a1d19c4635accd490e6a440118.pdf?index=true
    • https://uploads.strikinglycdn.com/files/6614058b-1514-418b-80f5-5e57e73f474f/15914155224.pdf
    • https://uploads.strikinglycdn.com/files/dc62ffef-c1e4-4b42-83ac-14a793514609/how_to_play_yiruma_river_flows_in_you_on_piano.pdf
    • https://uploads.strikinglycdn.com/files/06acdaa7-e2b7-49c3-adff-6a9fba9cf119/81932176965.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f3.bin
1d4fdee0521fef72bf3e2c09003e25cd4766dd45ae90b48257e47be0784489a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 5444 bytes
font_01_sfnt_off0000f465.bin
b621f68703180434b888bd0567ab88b10c2e1cba6cf41d008d8c75724b0cc126		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 11588 bytes

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