Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded334ba3032445f…

MALICIOUS

PDF

76.3 KB Created: 2021-04-30 11:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 22fbd82d77be30d4ae41d0a7599ed398 SHA-1: 690c10523f563c06cdc33d22e2e02ca5313ff99a SHA-256: ded334ba3032445febfc180b430bac6d32bfc76f0a8cb108125dc8b335a63cef
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to SEO redirectors. The document body, though heavily obfuscated, suggests a lure related to printing shipping labels. The presence of a link farm and redirector indicates an attempt to drive traffic to potentially malicious or scam-related websites.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://gimoguvi.ru/strik?utm_term=how+to+print+ebay+shipping+label+on+dymo+450 PDF link annotation
    • https://cdn.sqhk.co/jatobeguji/jjeYgcw/kipovijawotelesoguvopet.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/Y86WfZL/rifeninanuzuxujaxiwixib.pdfIn PDF document text
    • https://cdn.sqhk.co/xanovika/Ny5jaeh/tifemaruvukumekomawosa.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/5088440.pdfIn PDF document text
    • https://cdn.sqhk.co/begokaxawip/dggqbja/smalls_auction_live_bidding.pdfIn PDF document text
    • https://xurigaguk.weebly.com/uploads/1/3/4/6/134635426/4484044.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/kPicjaI/download_block_city_rampage_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/ijje6Xk/97444381472.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/idjjhcg/wupirewudiwiwirim.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/hxjehiP/95899438981.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/a070063d-5fa2-449e-baf6-5d3d918db638/jozewodakowuxexadoxamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ee7340-137e-4180-beed-b3f5cb8a6b81/vampire_diaries_season_1_cast_ages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/504889bb-cada-4735-a72b-3cf4090da17e/what_is_the_difference_between_general_purpose_and_specific_purpose_software.pdfIn PDF document text
    • https://07e0a16e-b77d-475b-b724-88bbaedb347c.filesusr.com/ugd/8e9e2f_c76ababa51264025a71b0685a08ea085.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/933c302a-c625-41c0-af56-631732b60313/gebumodaxis.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_9687f3d810e2472f9c6fec2ae401e444.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d25b14c-9982-4d46-9792-dade404bba5b/49536849031.pdfIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_79955024c7364cf693e9b2a1c5446522.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4c94f6c-abfa-4ee5-a9dc-a01c2fa96d18/fotalekumupise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e6cec4-ec29-484b-8e70-29336139b266/nonunoxisigekedomeva.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_off0000ec4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4A 6020 bytes
SHA-256: 8e9a01a4267611c157c44464c93107c5de740738d4a6057f14787a8693da4713
font_01_sfnt_off000100b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B6 10264 bytes
SHA-256: 28786be06aa26a404702f5067999f43f5879d89e31f502b3a6cefa94259eebac