Malicious PDF — malware analysis report

Static analysis result for SHA-256 6812aab6dfcc53b6…

MALICIOUS

PDF

79.1 KB Created: 2021-05-19 14:51:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 116e7ff89179074a72c1f1a0d06f3a7f SHA-1: 0c49326ea4bd30d9da8c904ea7953619b866b853 SHA-256: 6812aab6dfcc53b6c69fcc33b5d51e9c81c30a0510cb05248c6b4515c29873ed
244 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'find my iPhone', likely a lure to entice users to click the malicious links. The presence of multiple PDF links and a redirector URL strongly indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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+turn+off+find+my+without+iphone In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_60400aa858fbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501509/normal_603691eb8e7c4.pdfIn PDF document text
    • https://zabosete.weebly.com/uploads/1/3/1/1/131164473/5a0245b8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_604e056c32da7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451737/normal_606cbaa675e98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464874/normal_6020a99136d9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496170/normal_5ff527b185d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_601a80150e3fa.pdfIn PDF document text
    • https://jevefelenop.weebly.com/uploads/1/3/0/7/130775498/warenufilovibod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454678/normal_5fe2fa76b7cc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376599/normal_5ff134afcca69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470412/normal_60639876dd855.pdfIn PDF document text
    • https://dururamud.weebly.com/uploads/1/3/4/8/134846475/1973611ffb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379222/normal_604a81229ce71.pdfIn PDF document text
    • https://towutibe.weebly.com/uploads/1/3/4/0/134012467/4621415.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379387/normal_5fe64a5fc0e42.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/dcc6dea60a453.pdfIn PDF document text
    • https://vokinojen.weebly.com/uploads/1/3/4/8/134851280/8388729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_6058ec6341bfd.pdfIn PDF document text
    • https://temerineg.weebly.com/uploads/1/3/0/9/130969052/gewakemijuvapu.pdfIn PDF document text
    • https://pixiguva.weebly.com/uploads/1/3/2/6/132681827/9895611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482403/normal_60035de3c9708.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/10ea2591-854c-4890-86bf-c15050c0de5d/12112282981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f772bd8a-0b6f-492d-a1ca-518a699d8a23/eheim_auto_feeder_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/251ac7cd-5538-443c-b66b-d4277ca36da9/vezakulakotenud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55c0fa73-bc80-467a-b5fd-0843f59b048f/enterprise_car_rental_agreement_terms_and_conditions.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_off0000f8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8ED 5016 bytes
SHA-256: 4e58dfec272211573b54025afc8bc602696e82aa8cad4c1da208b599d1fbd5e7
font_01_sfnt_off000109e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E9 10744 bytes
SHA-256: c1470559e1130069d76d7c16137fa090251f98696a1bd133cb92313325af64cd

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