Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbeb580a564c0371…

MALICIOUS

PDF

95.1 KB Created: 2021-03-28 10:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c360ac904c4e6823be805fc3da53b766 SHA-1: 78238de3594f7564a1f1afea2a0db37023efc513 SHA-256: cbeb580a564c0371f8d54998dcdc22e9706eae1f0fd661e820987d8b77638a08
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The primary URL, https://baarspo.ru/award?keyword=castrol+magnatec+stop+start+5w+30+a3+b4+pdf, is likely part of this malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://baarspo.ru/award?keyword=castrol+magnatec+stop+start+5w+30+a3+b4+pdf PDF link annotation
    • https://cdn.sqhk.co/savekedeg/ghxliga/bikram_singha_full_movie_in_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/jajb7Ir/brutal_death_metal_radio_online.pdfIn PDF document text
    • https://vujewixijul.weebly.com/uploads/1/3/1/4/131437312/1290639.pdfIn PDF document text
    • http://zixaxagewan.mypressonline.com/how_to_connect_bluetooth_on_pioneer_mixtrax.pdfIn PDF document text
    • http://desokore.medianewsonline.com/tatug.pdfIn PDF document text
    • https://cdn.sqhk.co/poxofufiko/hyNiigg/rasuzeroluzodopovewugid.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/Gjc1jdp/pulezafetogukutimopow.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/eXKShiB/cartoon_cat_call_gif.pdfIn PDF document text
    • https://xidalivukudupet.weebly.com/uploads/1/3/4/3/134319957/pifikebej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/189e8f99-9ddd-431a-bc00-91e8c44c90c1/what_happens_when_you_have_a_w_on_your_transcript.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b91d66a6-0593-46ad-9795-58ee80f5800e/samsung_rf268abrs_not_cooling.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/247f1104-12a4-4aad-b765-06663998aa11/ethical_hacking_tutorial_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72b16d8e-484e-40c2-af6c-ef50606c160c/dabosijukasafine.pdfIn PDF document text
    • http://fukoter.rf.gd/xereradukaxifawobusasow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb59b039-577a-4723-bdf4-3cd88579effe/guratejop.pdfIn PDF document text
    • http://kisezemewarajox.rf.gd/sexual_orientation_example_sentence.pdfIn PDF document text
    • http://sakigekoxigukil.epizy.com/evernote_cornell_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c071cf38-c5fc-42b0-9f7d-2ef85c10b748/what_time_do_ross_clothing_store_open.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1B 5988 bytes
SHA-256: e8ff4fc2e09a7db27899fb01efccad49679fc896900ae12a5c3002155925dff1
font_01_sfnt_off0001237d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237D 11884 bytes
SHA-256: 3aff5422c098afed66d562044a28166feb60be9f3ecb4ec18ff38abd1b4b69a1
font_02_sfnt_off00014c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C2D 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7
font_03_sfnt_off000160c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x160C5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361