Malicious PDF — malware analysis report

Static analysis result for SHA-256 d77c6a1f89f5f154…

MALICIOUS

PDF

75.9 KB Created: 2021-03-22 10:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c42274a2ffb50486df863bb75607d010 SHA-1: 81089b1d3c3a6a12a08d5ec202aeb1a528c5699b SHA-256: d77c6a1f89f5f1542de98082278ec63adb0c3bacf7bb06dc91ac8b26bb015248
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the nature of the PDF and the presence of numerous external URLs indicate a likely attempt to lure users to malicious content or phishing pages.

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.
  • 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://rimibike.weebly.com/uploads/1/3/4/6/134636102/soxoxupop.pdf
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/3763983.pdf
    • https://sebazolilerop.weebly.com/uploads/1/3/0/8/130874482/5356040.pdf
    • https://ziwuwozapa.weebly.com/uploads/1/3/4/5/134517717/vuzepiga.pdf
    • https://danivuzi.weebly.com/uploads/1/3/2/6/132681213/9600069.pdf
    • https://jeboxalu.weebly.com/uploads/1/3/0/9/130969965/bategunodaxubalogo.pdf
    • https://mubonunegaj.weebly.com/uploads/1/3/0/8/130874179/86406.pdf
    • https://ginupegoforijef.weebly.com/uploads/1/3/4/7/134760486/pirawazekezokolekim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://feedproxy.google.com/~r/wb/ENAH/~3/B9wesDdUo4k/wb?keyword=taco%20bell%20grilled%20chicken%20salad%20calories
    • https://uploads.strikinglycdn.com/files/be13dcf1-685e-42a3-baf6-121440924856/wisepojusidezotarimak.pdf
    • https://uploads.strikinglycdn.com/files/ee803496-691e-437d-9fc7-08c5d3955376/how_to_get_a_tv_show_made_in_australia.pdf
    • https://uploads.strikinglycdn.com/files/2fbcb8fd-8da6-4817-bad8-92f8aea969a7/57400764900.pdf
    • https://uploads.strikinglycdn.com/files/4cb53db6-f730-495c-b0c6-780e1f0c4a8f/rijapitexolitozatigutore.pdf
    • https://uploads.strikinglycdn.com/files/555c99f8-2280-4525-bc7f-8d04ebfa502b/puvesamoromaxov.pdf
    • https://uploads.strikinglycdn.com/files/173e703c-31a6-4359-b3ef-5a086a6dd9c8/glenn_vilppu_drawing_manual.pdf
    • https://uploads.strikinglycdn.com/files/e88e2b58-1555-4d76-aadb-72e9a242dd1a/29246964749.pdf
    • https://uploads.strikinglycdn.com/files/ca85ea00-31d1-4f50-942b-8bfc0c5ec7f2/gororugilenakud.pdf
    • https://uploads.strikinglycdn.com/files/0e0923ee-504f-4f72-a829-74fa9e26d72f/jelazive.pdf
    • https://uploads.strikinglycdn.com/files/8ca025df-217c-43c2-bf04-e71832c91a42/gatototodaxorumez.pdf
    • https://uploads.strikinglycdn.com/files/ac32bf30-5978-4897-8a1f-30109ab29da9/roxelaranewenamedufosabo.pdf
    • https://uploads.strikinglycdn.com/files/9531d259-277a-40f7-bd70-67079afdb2e4/what_is_the_sales_returns_and_allowances_account_classified_as.pdf
    • https://uploads.strikinglycdn.com/files/25ef7b56-6c89-4375-a6ab-59612dac0f55/12985708977.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb81.bin
c02679ef063dcd1b51e264de8729a4ad864b2abd40ed236d2a3f3c0e6655cb0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB81 5356 bytes
font_01_sfnt_off0000fda1.bin
2a7dadbf287f370aec0f34360546aa7434fd58342490fdc110bd70aae505c3f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 10800 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.