Malicious PDF — malware analysis report

Static analysis result for SHA-256 e484cea2b726f87e…

MALICIOUS

PDF

73.9 KB Created: 2021-05-17 08:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 43eb0e1447c8649ef82a4d6348e32a01 SHA-1: c60c89a48a1f4c06fad14abb6bf44a56fbeb2d37 SHA-256: e484cea2b726f87e1c93a520de0c241bef63b9be2196708bd4dca783dc1267b8
116 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are disguised as legitimate documents, indicating a link farm or SEO poisoning attempt. One of the primary URLs, 'https://crophysi.ru/strik?utm_term=how+to+fix+red+globe+on+fios+router', suggests a lure related to common technical support issues. The heuristic 'SE_CALLBACK_LURE' further supports this, indicating a callback phishing or tech-support scam pattern. No scripts were extracted, but the structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://crophysi.ru/strik?utm_term=how+to+fix+red+globe+on+fios+router PDF link annotation
    • http://xazutakivad.iblogger.org/povaduputobivexevomura.pdfIn PDF document text
    • https://lewaxirilukuxod.weebly.com/uploads/1/3/0/8/130813115/4337126.pdfIn PDF document text
    • http://vuxetexab.22web.org/travel_brochure_psd_free.pdfIn PDF document text
    • https://kuromazu.weebly.com/uploads/1/3/2/6/132695519/7849785.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zulidemuw.epizy.com/whirlpool_ultimate_care_ii_wont_spin_or_drain.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/mini_protean_tgx_stain_free.pdfIn PDF document text
    • http://kotalozobazad.rf.gd/53226817703.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/minority_report_book_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/jumajokum.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/97328743283.pdfIn PDF document text
    • http://sedegagagojuwej.epizy.com/prentice_hall_mathematics_algebra_1_textbook.pdfIn PDF document text
    • http://patepuxowibano.rf.gd/brother_ls-1217_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/pebodixejoluxixozitedib.pdfIn PDF document text
    • http://dufexisoji.rf.gd/how_many_carbohydrates_in_chick-fil-a_grilled_chicken_nuggets.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/zodowosijizodef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/277f3bef-6f5d-4e14-b445-4489a32ff074/zezis.pdfIn PDF document text
    • http://retelowanudugut.epizy.com/flowering_and_non_flowering_plants.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/xovugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a200831c-46dc-43e6-aa12-87ed522d97b6/dejijudufokazakilaparo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7339e46-a1e3-40e9-a113-c7aa37d8b783/sejuwipexi.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/fupeguwiwal.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_off0000e539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE539 5124 bytes
SHA-256: 72a1fcacd4250e9894d81e92bd4c34975444eff03c48961cb8704027324dfc33
font_01_sfnt_off0000f6d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D0 10412 bytes
SHA-256: 3d6344b9191df780ec23abedb28ddfa72a9061a363d94f846a91a73d33748846

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