Malicious PDF — malware analysis report

Static analysis result for SHA-256 1acf1c7feaae2bb7…

MALICIOUS

PDF

92.3 KB Created: 2021-03-11 11:21:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 553c419dbe4d0fe15d78522632fe150d SHA-1: d50d8d8868d7e2146c540adac2f57e71af789970 SHA-256: 1acf1c7feaae2bb7a725cf7dea106ee9b572905057d043838ecc12df9e73cb38
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one prominent URL pointing to a movie download lure. This suggests the document is designed to redirect users to potentially malicious websites for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/123?utm_term=bound+2015+movie++300mb
    • https://cdn.sqhk.co/xezalagefog/O1xhaVg/zajukuxajesutegadugow.pdf
    • https://cdn-cms.f-static.net/uploads/4386595/normal_60469446acfff.pdf
    • https://cdn.sqhk.co/lesasafo/hjcghd2/stickman_destruction_free.pdf
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5ffbf4ff43b7e.pdf
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/vilet.pdf
    • https://cdn-cms.f-static.net/uploads/4366402/normal_60158d2a6454e.pdf
    • https://cdn-cms.f-static.net/uploads/4366337/normal_603fb0a6c9240.pdf
    • https://static.s123-cdn-static.com/uploads/4374189/normal_600906ded6101.pdf
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/ace066b4908ec.pdf
    • https://cdn.sqhk.co/vadetegubufo/eihhbgf/zetab.pdf
    • https://cdn.sqhk.co/jopubelo/kia2cid/street_art_wallpaper_hd_free_download.pdf
    • https://cdn.sqhk.co/zirigajer/biaxVhc/xikaginijepuwuwenazuvizu.pdf
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5fdb25de1927c.pdf
    • https://cdn.sqhk.co/tijinujul/DhaghRr/zinger_stacker_tower_burger.pdf
    • https://cdn-cms.f-static.net/uploads/4459628/normal_603fab840464a.pdf
    • https://cdn.sqhk.co/besudamuge/ifL0hhQ/kubarifibepubipuniw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.orgThis
    • http://www.fontrix.comhttp://www.nhncorp.com
    • https://uploads.strikinglycdn.com/files/063ad55b-ae3b-47d1-8a81-306616f24869/55128868088.pdf
    • https://uploads.strikinglycdn.com/files/660e9f75-eafc-4454-b30b-9894a033f029/how_to_connect_alesis_sr_18_to_computer.pdf
    • https://uploads.strikinglycdn.com/files/e57b3aa5-1866-40b7-a1c0-809b4dbe05cc/zidopakipuwu.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
    • http://scripts.sil.org/
    • http://scripts.sil.org/OFLAbyssinica

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb85.bin
761f29dacefbf988069d5ed18f5e5ca943a982841a83beb38fd3a69b9c7b61a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 5316 bytes
font_01_sfnt_off0000fda0.bin
aa890c11d31957efca0fd402aa72a454fd9b4193136962196ca6c8da92cd1596		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA0 20968 bytes
font_02_sfnt_off00011dcf.bin
04d00fe4d3d1cfb13f6c45ea00a1a16b92fe51d00c0709aca980b96f225372d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCF 2276 bytes
font_03_sfnt_off0001279c.bin
55f1a4d68c6fb510383b1187bbf08d4f43a57341a98981355f04135cfbdba0a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1279C 15888 bytes
font_04_sfnt_off000158a5.bin
2e46b36fed23876ebb6e11f7a152916482bd8967c060a582f04975efc8a71266		 pdf-font-stream PDF embedded font (sfnt) at offset 0x158A5 2056 bytes

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