Malicious PDF — malware analysis report

Static analysis result for SHA-256 fac805a41dc5b4a3…

MALICIOUS

PDF

79.2 KB Created: 2021-03-19 04:43:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65a4f2c3332249298db91712c8d21f10 SHA-1: c20d8af50931f480afd92e467c401fd2a342f0c7 SHA-256: fac805a41dc5b4a32d9bcb0fc19bb2a26116222b5e250de1bc8e039a119c8dd7
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate 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 an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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
  • 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://jumiwimov.ru/123?utm_term=jio+mobile+ka+video+calling+apps
    • http://diletemofuvufu.22web.org/apkpure_spotify_premium_apk.pdf
    • http://redirerer.medianewsonline.com/xefomufabodez.pdf
    • https://pizijejubuga.weebly.com/uploads/1/3/4/8/134883891/ruwodemom.pdf
    • http://pigigozoruda.mypressonline.com/is_saitama_a_parody_character.pdf
    • https://fivosegexaf.weebly.com/uploads/1/3/2/6/132683078/37f418788.pdf
    • https://diruxopegew.weebly.com/uploads/1/3/4/7/134713863/lotaju.pdf
    • http://witikotuxigere.scienceontheweb.net/mikowadew.pdf
    • https://pimujupaz.weebly.com/uploads/1/3/4/4/134440235/tukulusizomixeliwav.pdf
    • https://tuzenuzibawura.weebly.com/uploads/1/3/4/7/134733138/mefajexur.pdf
    • http://jetirirafu.iblogger.org/what_book_comes_after_hope_to_die.pdf
    • http://kemutedetabu.scienceontheweb.net/60110222528.pdf
    • http://golixudib.mypressonline.com/40672905172.pdf
    • http://fukikenikiru.22web.org/84483074962.pdf
    • http://rakilepisejax.22web.org/nibutebupapevoliluwefizu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/legenapi/kindergarten_progress_report_card.pdf
    • https://s3.amazonaws.com/lorugipopuxe/33846662069.pdf
    • https://09af0a6c-c0e6-47ff-90c1-5b173435ccd1.filesusr.com/ugd/b92b66_cab69c9b49e748d7af29ec2a8e466191.pdf?index=true
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_a587c4417eac4368b53d6d375c8b7388.pdf?index=true
    • https://d992f69e-bc5b-430a-92d7-abfd66d0380b.filesusr.com/ugd/6f7357_a2a4c9dc7de0467483cd706964ec5b7d.pdf?index=true
    • http://zekarevuwo.epizy.com/tuvirowemil.pdf
    • http://molodetagako.epizy.com/fowepipafapomikamen.pdf
    • https://13adc596-845f-4f4a-b539-e2c04a0a4b5a.filesusr.com/ugd/6e2da7_7853b16f3a784f59b8c817b05f63a8d7.pdf?index=true
    • https://s3.amazonaws.com/xowasosuf/des_moines_wa_police_online_reporting.pdf
    • http://raselitabak.epizy.com/35754682426.pdf
    • https://3dd85f33-233b-4b3c-8e53-142bc8307eec.filesusr.com/ugd/8df890_898a1c6d17a940feb79eb9b053616e77.pdf?index=true
    • 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_off0000f7e6.bin
087db3e805ab04051004149295e4c3fb2b70558dabdb073ba03edd792d4bd070		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E6 5548 bytes
font_01_sfnt_off00010ab7.bin
1f8127a60efcda5606fb0dd1b71e2916534fe181e9f46a4cbb8ce015aee48181		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB7 10756 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.