Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e75e21471e1c8a1…

MALICIOUS

PDF

97.3 KB Created: 2021-03-29 08:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a5332c95e7822a7f865dacb689d04367 SHA-1: c9456b5c2832c9af67923b1a39d7cfa80bb1ef59 SHA-256: 1e75e21471e1c8a15284903e1c391fb4695fee0c00baea3649b35d43d7f6fe55
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body text, though partially obfuscated, includes keywords like 'Aadhar card pdf open' which are likely used as lures to encourage clicks on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://midufefew.ru/award?keyword=aadhar+card+pdf+open PDF link annotation
    • https://bobugebajagon.weebly.com/uploads/1/3/4/6/134682349/9326772.pdfIn PDF document text
    • http://jumbochecker.com/aja_ki_pro_quad_manual64kii.pdfIn PDF document text
    • https://julotovodirol.weebly.com/uploads/1/3/4/5/134522883/gonagorixa_fogomololuz.pdfIn PDF document text
    • https://zekigoduse.weebly.com/uploads/1/3/4/3/134336209/5790848.pdfIn PDF document text
    • https://xiwupezarevapo.weebly.com/uploads/1/3/2/6/132681984/nugunegetafazi.pdfIn PDF document text
    • http://olx-delivery.cc/what_tools_use_dewalt_batteries6imqc.pdfIn PDF document text
    • http://spencermcman.us/18584061711avs3z.pdfIn PDF document text
    • http://sedouche.xyz/nopipojuxofudwh3e.pdfIn PDF document text
    • http://firstreadersclub.com/john_grisham_a_time_for_mercy_paperbackxbmk4.pdfIn PDF document text
    • https://sazaburesifug.weebly.com/uploads/1/3/4/2/134265765/6781337.pdfIn PDF document text
    • https://fupopafesuz.weebly.com/uploads/1/3/4/4/134443157/tufipi_dokuzafuzelen.pdfIn PDF document text
    • http://naturaleone.space/786646730086zf04.pdfIn PDF document text
    • http://getchambre.xyz/37531878320fmgjq.pdfIn PDF document text
    • https://nebenumepidenok.weebly.com/uploads/1/3/5/3/135307723/befotene.pdfIn PDF document text
    • https://xawewidijaxiju.weebly.com/uploads/1/3/4/2/134266046/bdcbb7.pdfIn PDF document text
    • http://orbitan.fun/how_much_does_a_ruud_hvac_system_costw1iyq.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/0723ad7755658.pdfIn PDF document text
    • http://omynutural.space/el_socio_jenaro_prieto_libro_completofzy68.pdfIn PDF document text
    • https://napuraviseso.weebly.com/uploads/1/3/4/3/134322211/41d3014f8458.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/planet_fitness_application_for_membership.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/garajasinuvesobumekola.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/avengers_infinity_war_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/19877527.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/blue_jackets_blackhawks_odds.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D6 5020 bytes
SHA-256: 01eb011146e366cf8c80f3d67325875e8c1555e33aea1bff8b1c33f20757ceb6
font_01_sfnt_off000112e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E3 8676 bytes
SHA-256: 42213c1c646469ceccb4b45008564cf45e0bbb9dc3845c55fae517917375b47f
font_02_sfnt_off00012aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA9 3364 bytes
SHA-256: b7c5dc24271436a04db2ea3b2ffa82ebb81d34ec70c1a812011be339330798aa
font_03_sfnt_off0001384d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1384D 10936 bytes
SHA-256: be2336d1ab7f1bd2f7b1e5ec877cea66dddaa6542ce0228362bab3a4c1c52d84
font_04_sfnt_off00015db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15DB9 16568 bytes
SHA-256: fd4554e142537dccc99279ee1dd9a5d94e8354c1a29fa9c94e4abb6283283c16

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