Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb22cceeab4088a5…

MALICIOUS

PDF

74.7 KB Created: 2021-06-06 07:49:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0507547c7b16cfd4268522dc5672aa4f SHA-1: e5648b06c3b024ce40bdb7d9b8d111de2cb1cca5 SHA-256: fb22cceeab4088a5aa569f3965e46a2c73f5b3d000a141632e35eb35b4fba4d1
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 hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites. The document body, though heavily obfuscated, contains a URL related to 'android auto not working', which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://catamma.ru/pbw?utm_term=why+is+android+auto+not+working PDF link annotation
    • https://jijajaxasivezix.weebly.com/uploads/1/3/4/5/134588510/b7008c2.pdfIn PDF document text
    • https://bekariniwoxisit.weebly.com/uploads/1/3/2/7/132710774/jinorizonizag.pdfIn PDF document text
    • https://guzoxufogoxuwo.weebly.com/uploads/1/3/4/0/134097696/pusorureju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_604bbb185d73e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365662/normal_5fd097d53f94a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458635/normal_5fe4b39695311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478387/normal_601e607f0f51e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473916/normal_6064811bf3485.pdfIn PDF document text
    • https://ladupizisegi.weebly.com/uploads/1/3/1/3/131380895/2713073.pdfIn PDF document text
    • https://zipixaxunisegon.weebly.com/uploads/1/3/4/6/134625234/pilotuvezi-wakedovetuxo-bogexazowaxuvar.pdfIn PDF document text
    • https://xazewipiw.weebly.com/uploads/1/3/4/7/134717961/5978763.pdfIn PDF document text
    • https://lilawowawumoxo.weebly.com/uploads/1/3/1/4/131453384/7723946.pdfIn PDF document text
    • https://tevufipe.weebly.com/uploads/1/3/1/6/131606546/zulikavogowuni.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4389104/normal_60b4b853ad585.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465396/normal_5ffed113ae878.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417830/normal_6053f04355702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf27bda2-6305-4cb1-bb07-0e06c8905501/fnaf_4_full_game_free_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8314dfca-76ad-43d3-b90e-7f88db8b3956/jakutenud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db14f4cd-06f5-4970-bad8-570b6d257305/61525021508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d95d7b-b65d-43d0-86b9-04b25509316b/incredible_5_point_scale_anger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/516a05be-694a-4181-b1e7-9e0f28d081e1/brother_2270dw_print_test_page.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c7eb122-c4b8-4350-9e00-96ce3513b079/33283025228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a4e580-d43e-4e89-b2a2-3246cc6f0a04/how_much_money_can_you_make_selling_a_movie_script.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe2e1c3d-0eaf-4e35-8d72-7e60a13c4918/how_to_download_youtube_on_your_dish_hopper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2463364c-3fdd-4dc8-93a2-6338a4d10d66/cch_reset_tp_link_841n.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6ca256-ed00-4381-a8c0-c84ce689c796/tascam_dp-004_power_supply.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 5324 bytes
SHA-256: e8c93a7a271941a53f15117577e91b0b99a7d7be1c9f19c001e535ba13fcb101
font_01_sfnt_off0000f8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 10916 bytes
SHA-256: 6e2cf85f72c2875c0a4d3ece3d8748c2afeb8d1d155716a3508dc29e9265c18f

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