Malicious PDF — malware analysis report

Static analysis result for SHA-256 78767b0aceb7ae95…

MALICIOUS

PDF

82.0 KB Created: 2021-05-16 02:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ddd49b7158a55e8082d960c174b50e12 SHA-1: 3469a3bc726e50b3806806e8e03d312affc4f9e6 SHA-256: 78767b0aceb7ae952cbaa344a5daffc308488db8e34c67e73794634884476359
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. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body displays a fake Netflix error message, likely intended to trick users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://nipisod.ru/strik?utm_term=error+al+conectar+netflix+codigo+ui-800-2 PDF link annotation
    • http://jifarobajis.sportsontheweb.net/constitution_scavenger_hunt_answer_key_us_government.pdfIn PDF document text
    • http://nosixavol.sportsontheweb.net/27462469793.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/lseTibR/classic_cars_auctions_europe.pdfIn PDF document text
    • http://motubudasuvapan.medianewsonline.com/torewimavobe.pdfIn PDF document text
    • https://cdn.sqhk.co/govovazeket/gjb6xia/icici_mobile_recharge_coupon_code.pdfIn PDF document text
    • https://cdn.sqhk.co/zakolemafemo/fF8jhhf/ninja_raiden_revenge_apk_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_523bc74d05f949fbb7ce47df459b5163.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb459583-c29b-4f6f-9abd-d73fe16e9c33/21893000725.pdfIn PDF document text
    • https://7915398d-c9c2-4241-abdb-40cf742e4b8d.filesusr.com/ugd/d4df0f_6a1c2a4fe7d84102ac66b68d47a15d31.pdf?index=trueIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_8670f4f4004545a8a9a18091453723ad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d408816-f164-4c78-9174-0439793b930d/zadug.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/77577394119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7f458a7-64d9-4267-a03e-56d6bfa914ae/tamuzanavinutakijilagomo.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_66d35562085841e580dbb062b6e3649c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d585f15-d785-4e95-b8e9-02ef3582c285/xajobigodobenugukeje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a518416-a716-48f9-9b4b-23e81569fbad/why_did_netflix_remove_blue_is_the_warmest_color.pdfIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_8d0e8941d50c408799b9ca3a6e584cdb.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_9446195ab8994779967719211d023387.pdf?index=trueIn PDF document text
    • https://47a25507-5c4f-4e73-9b7c-0c49514c8174.filesusr.com/ugd/e00bd3_5afcb126690d4455bb9111a5ac77da21.pdf?index=trueIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_a389a675ac1a4bcc8b374243481be879.pdf?index=trueIn PDF document text
    • https://9fb0fece-6c2a-4f8b-8ff1-5d9ea67f5ee7.filesusr.com/ugd/f6a907_cfdb225315914493b41c2398e04e5526.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/why_is_my_oil_furnace_not_igniting.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/vobakajesofasizogob.pdfIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_64a0a8ab648044959b195183b0373440.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 5536 bytes
SHA-256: 3a20d4b199a782f64ea66f476185a382cda5b80a93872a9d43230fb24e3eee64
font_01_sfnt_off00010808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10808 2024 bytes
SHA-256: a511fb262e2f240b0cc62b800179189f1c69c7b4d67d938f9bc0c5e12ef74554
font_02_sfnt_off0001119d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119D 11956 bytes
SHA-256: 0cbc1621eba065dfd7a4514eb84b937d7024a312525f867de1b0f41f6068859a